Fmx vacuum modulator adjustment. I’m having trouble getting it dialed in just right.
Fmx vacuum modulator adjustment Just installed new modulator valve in 1969 Cougar with FMX, 351W 4V. 40 shipping and handling) FMX Modulator Pin (1968-81) sent to anywhere in the lower 48 USA states via US Postal Mail Next steps are to put the pan on and the vacuum modulator. I can't see inside the small hole where the vacuum line attaches. Also verify if you are getting vacuum at the modulator. I know the screw is in quite a way (I got it this way). remove spacer and tighten an additional 3/4 turn, hold adjusting screw stationary and tighten locknut securely. Original family owner of the power train 351C 2v FMX. Few turns with a screw driver, adjust as necessary. After researching more I found out that there should be a small diameter pin about 2-1/2" long. If the Modulator doesn't adjust shift points, I assume you have to get into the Thanks for any inputs. Delayed shifts come as a result of low vacuum (Wide open throttle). Considering that I probably do have some wear in the transmission that lead me to have to make the vacuum modulator adjustment, are you willing to give an estimate about how long this adjustment will give me According to Gregs300CD (thanks for the info, BTW) the automatic transmission vacuum modulator has to be tested for proper vacuum before adjustments can be made. This comprehensive guide covers essential tools, step-by-step instructions, and troubleshooting tips to tackle common issues like erratic shifting and poor acceleration. When I got home I looked it over more Puttster hit on the key hereit's gonna take some measuring and comparisons between pin depths of both old and new modulators to come up with a fix. Single diaphragm, I read somewhere on this board that you can adjust your transmission by turning a screw in the vacuum modulator or something like thatI don't even know what a vacuum modulator is. 24 . A bit more about the Vacuum Modulator - be sure that you have a good solid source of intake manifold vacuum for it, and that all rubber hoses and/or steel tubing down to it are good with no leaks, besides checking for blockages as 19704X4F250 says. PeachPartsWiki: Transmission Vacuum Modulator Adjustment I downloaded a file from WIS which contains data about how much pressure you should read and etc. It's an FMX. $40. I would also adjust the front band according to the service manual. Diesel Owners this is a good link The adjustment changes how the spring in the modulator reacts to vacuum. What unique about my shift issue is that I don’t see any connection to the vacuum FMX MOD12 VACUUM MODULATOR. It runs fine, just won't shift into 3rd. hope this FORD C6 TRANSMISSION VACUUM MODULATOR Black Stripe Low Vacuum Truck | eBay. 95. Others talk about blue color markings, turning the modulator in (CW) or out FMX is the exact same. Jump to Latest 2. All the adjustment does is alter the point where the servo starts to move. (vacuum should be very near zero under WOT settings and the modulator begins to function at about 10 The shift modulator is there to literally "modulate the feel" of your shifts. Original Equipment (OE) Part Interchange. Save Share Reply Quote Like. See pics for the progress for the day. You adjust it by screwing the whole assembly in/out of the transmission case and tightening a locknut. Your Cost $ 36. Scott Taylor, Arizona Cougar Club President & CCOA 428CJ Registry Guy 1970 XR7 Hardtop 428CJ Ram air Black, 1970 Eliminator Clone convertible Comp Green and a few project Cougars as well Red Stripe Vacuum Modulators have an adjustment screw right inside the stub where the hose goes on. 1973 Mercury Cougar. I’m having trouble getting it dialed in just right. Thanks Transmission Vacuum Modulator Adjustment I've checked for any loose vacuum lines in the engine compartment but all seemed connected. 181 posts · Joined 2004 Add to quote; Only show this user #1 · May 20, 2006. The modulator does not affect wide open throttle shift points or shift force. bob 2004-07-07 03:04:36 UTC Search results for 'Adjusting Shift Points on FMX automatic New Adjustable Blue Stripe Screw In Type Vacuum Modulator This Modulator Is An Updated Version That Replaces Many Different Types In Very Many Vehicles. The small hose on the side leads to a seperate vacuum chamber inside the modulator and is connected to carb or EGR vacuum . This video shows how to replace the vacuum modulator in a 1974 Ford C4 transmission. Posts: 127 From: Fresno, CA Registered: Apr 2002: posted 09-16-2002 11:17 PM I had to buy a few of the modulators for my FMX. behind a 72, 351 Cleveland. 9 posts This Modulator Kit Will Be A Single Red Stripe Type And Will Come With; New Updated Fully Adjustable Single Red Stripe Vacuum Modulator. Hi, I have some issues with my FMX. Replacement And Adjustment Combo Instructions Sheet. 1993 GT 13,000 miles, Built 2-12-93 Auto, 3:27 Axle, cloth, sunroof, AC. Is your transmission shifting too early or too quick? Then The only thing that I can quickly think of is manifold vacuum. You will need our detent cable, K77978SP. FMX modulator pin was missing. Transmission Vacuum Modulator Adjustment . Now the FMX has the modulator as well but that should only adjust the firmness of 2 and This is the first I have heard that a Vacuum Modulator only: "that should only Again, As I said in the 4th. I changed out my The adjustment range on those modulators is not all that much in terms of the actual change in performance. Post by bob. don’t recall what color I went with, but I put in the “lightest” one I could buy (lowest vacuum Quick demo on how to access and adjust a vacuum modulator on Ford C4 transmission. Jul 6, 2010 · I ended up replacing the intake manifold and carb with Edelbrock Performer intake and 600 cfrm Edelbrock Performer electric choke carb and the problem went away. Decided to replace the vacuum modulator, replaced it and also discovered the Hard vacuum line was missing. 51-0020. Cast Iron Ford Vacuum Modulator. Aug 26, 2006 · I know for sure on my 71 FMX with single vaccum modulator I can adjust it with a small srewdriver. Trans is a fresh rebuild. Might there be my problem? Thanks again Ralf. Jump to Latest 11K views 4 replies 2 participants last post by Trickpony Oct 20, 2006. There is one more modulater that you can try too find it is the Modulator - Vacuum - FMX Transmission - Repro ~ 1969 - 1973 Mercury Cougar / 1969 - 1973 Ford Mustang. vacuum at modulator is 15 and engine is tuned but problem exists. When I look for the modulator anywhere it does not show that it comes with the pin. Thanks Sean '87 GMC R2500 380,000km If your pump and v r v are in good shape little adjustments will make big changes on the shift points . The hard line is pre-bent and goes near the back of the intake manifold (held in place with one of the bellhousing to block bolts). The shift selector is adjusted properly. that's exactly right. LRDaum May 16, 2019 · First, look at the door tag. S. on my 71, when the vacuum modulator was unplugged on my 71 C4, the symptoms were really hard shift neutral to Jan 27, 2013 · Adjust screw if needed. This will cause earlier shifts. Modulator vacuum c6 ford transmission stripe truck adjustment low ebay source Ford c6 vacuum modulator symptoms Ford c6 vacuum modulator replacement. A transmission vacuum modulator adjustment is an important part of maintaining the proper operation of a vehicle’s automatic transmission. 1 post · Joined 2014 Add to quote; Only show this user #1 · Jan 12, 2014. I adjusted it out two turns and it was a little better. tighten adjusting screw to 10 INCH lbs. Make + Transmission + Year Range + Unless otherwise noted, Rostra products fit all years of listed transmissions. What does adjusting them do? Would that (low vacuum) cause this sypmtom and if so, can it be adjusted for? Maybe my modulator is stuck since turning screw doesn't help much. Narrow Your Choices + Clear All. Modulator Valve. The one facing rearward goes to the tranny. Can maybe turn it 1 more turn clockwise before it bottoms out. 1-1: REAR BAND ADJUSTMENT The rear 1973 - 1979 F-100 & Larger F-Series Trucks - vacuum modulator adjustment? - how do you adjust the vacuum modulator on a c-6. I inspect it, no blue stripe, No stripe to be exact. Qty: Description Multi range adjustable modulator. Some early Ford and GM vacuum modulators are adjustable and adjustable modulators are available from aftermarket suppliers. A vacuum modulator is a device that uses vacuum pressure to control the transmission of fluid through a pipe. Check and make sure the vac line's not rotten or collapsing, that it's connected to the right fitting on the engine, etc. I can not find where to buy this. Thanks. Ok. Try removing the vacuum line from the modulator (plug the line) and testing. He did this in an ill-fated attempt to save Would not shift out of 2nd gear. Fits: Small case 1961-1981, medium case 1961-1972, and large case Ford C6 Transmission Vacuum Modulator Valve 24 Dec 2023. Bobby ===== First, look for a blocked or crimped vacuum line to the modulator. We were getting ready to replace the tail housing gasket, rear shaft seal and bushing. The modulator valve is blue stripe Standard TM10. 24. Since making adjustments to the engine, you've probably changed the amount of vacuum or at least at what engine rpm it is made. Post by Learn how to adjust your vehicle's vacuum modulator for smoother gear shifts and optimal performance. The intermediate band is adjusted from the outside of the trans by adjusting the 'fixed' end of the band to a certain torque value, then it is backed off a specific number of turns, then the jam nut tightened. TCI® StreetFighter® modulator-type transmissions are all equipped with adjustable modulators. IIRC, the tranny spent very little time in first gear, and I was able to increase this via the modulator adjustment. Ford c6 transmission modulator valve adjustment 1977 f150 -adjusting the vacuum modulator on my c6 Modulator valve oversize 01k Vacuum line Sam: On my '91 420 the tranny vac line connects to a banjo fitting on the right rear of the intake manifold. If I remember correctly, counter clockwise will decrease the upshift point. It is often Aug 21, 2002 · My FMX has all the goodies including a B&M Shift kit. Ford c6 vacuum modulator adjustment. Apr 16, 2013 · The Medium Case Transmission is interchangeable with all parts for all years. (1967)? It shifts too quickly through the gears at part throttle. here's what I found From some of the research I have already done the pushrod should be: 2. another trick is to pull the actuator rod out from Can anyone tell me the proper way to adjust the transmission modulator on my 69 Torino with a FMX 3 speed trans. Though you can get odd symptoms when one is damaged in some way. Purchase Product Here:https: I have a 1969 Ford FMX transmission. bob 2004-07-07 03:04:36 UTC. From sitting in drive at stop sign then light pedal is it possible to adjust the shifting firmness with a fmx modulator. 2. You can turm the adjustment either clockwise or counter clockwise, depending on if you want to increase or decrease the upshift point. If I recall correctly they all use the vacuum type modulator valves. Should I be able to pump a specific number of inches of vac and expect it to hold? What I see now is that I can rapidly pump down to about 10" of vac but it bleeds off within 3-4 seconds. Under low vacuum conditions, such as upshift, you'll notice a slight difference when you change the adjustment. Cruise-o-matic, FMX, FM, FX, MX, Fordomatic, Cruiseomatic, Cruiso. Link to post Share on other sites . Also, if there are two vacuum lines running from it, it's a double diaphram, like mine. 1971 Mercury Cougar. I bench tested them all with a mighty vac hand pump and logged what vacuum they started to move, and what vacuum was required for full travel. When I am driving and come to a stop my car's RPM drops to the point of stalling. The rotating assembly is pretty much the same, but the valve With the exhaust installed, the modulator is hard to get to. I would like it to stay in low gear longer. Share your knowledge of this product with other customers Be the first to write a review. Its got good vacuum and a new modulator valve. 4 Vacuum Regulator Valve (VRV)— E-250— E-350, F-250— F-350 with 6. What is the most optimum shifting calibration of the modulator valve for power, fuel efficiency and health of Blue stripe vacuum modulator for all Cast Iron Ford Small, Medium, and Large case units from 1961-On. Tweet Facebook WhatsApp. You can go two turns in or out. not for a C6. Found out the adjustment screw had loosened itself enough to cause a vacuum leak. do all modulators have an adjustment? thanks Adjusting the FMX modulator. It seems like I could just bend up a run of hard line w short rubber jumpers and be back in business. Just trying to figure out the best procedure. Ford Applications. If you have a Ford C6 automatic transmission, then you know that one of the most important parts of the transmission is the vacuum modulator. While I didn't do that on purpose, I assumed that meant it was working (low vacuum means stay in lower gear). But the observed shift-points can certainly be changed by modulator adjustments; under light throttle 1/2 upshift is a some 6 - 10 May 3, 2020 · On a 63 Cruise-O-Matic, the kickdown rod is only for a wide open throttle downshift. Being at screaming RPM at 25 indicates that the tranny isn't shifting out of first. Share this post. 56353 posts · Joined 2001 Add to quote; Only show FMX Transmission vacuum modulator blue stripe 1968-81 : FMX Transmission blue stripe modulator Competitors Price $36. You can check the mod valve with a vacuum pump and make sure that trans fluid Some there talk about an adjusting screw where the vacuum line connects – but I don’t see one. There's really not a bunch of adjustment there though. Ford FMX Modulator Valve Pin. Post Apr 30, 2006 #4 2006-04-30T12:54+00:00. Clockwise spaces out the shift points and counterclockwise closes up the shift points. Trade-Alley (5185) 99. Adjusting modulator valve on Ford Locating the vacuum modulator: Learn where to find the vacuum modulator on your Turbo 400 transmission, typically situated on the side of the transmission case near the rear, and connected to a vacuum hose. If you're on a budget and doing this yourself I would suggest a new adjustable modulator and properly adjusted (small screw inside nipple where vacuum hose attaches) after install. 865 Adjusting modulator valve on Ford C4,C6,FMX transmissions. Now no upshifts. There are two vac lines on this fitting. I cannot see a stripe on mine. Make sure the vacuum line to the modulator valve is open. Aug 29, 2006 · There should be a soft rubber vacuum line running from the vacuum modulator to the hard line. 453 posts · Joined 2008 Add to quote; Only show this user Sep 25, 2003 · 1. While it was out my friend, who is very knowledgeable about rebuilding Mustangs, insisted I should put a mild shift kit in it. Clutch, Transmission, Differential, Axle & Transfer Case - C6 Modulator Adjustment - The previous owner of my 77 F-150 460/C6 2wd decided to adjust the modulator on the C6 transmission (newly rebuilt) to shift very quickly. Select a vehicle to view Ford FMX Automatic Transmission Vacuum Modulator With Free Gasket. Turning out makes the diaphram think it sees more vacuum- light pedal, slow FMX Shifting. Just drop a pin in the end with a pen mark on it. I found a few good vac diagrams for my car, but they all show two lines into the vacuum modulator -- Classic Cougar Tech 351W/C6 kick down Is there a specific FMX forum I did find a huge vacuum leak so i am working on sealing the intake up and replaced the vacuum advance But the stock 65 modulators are fairly common. Hello All, seen several post about the need for a vacuum line from intake to the vacuum modulator. 17-10-4 C6 Automatic Transmission 17-10-4 VACUUM TO TRANSMISSION VACUUM DIAPHRAGM VACUUM REGULATOR VALVE < VRV) 0 Q ADJUSTMENT u SCREWS D4909-1 B FIG. 1973 - 1974 Ford Country Sedan I have read numerous posts regarding adjusting the screw inside the vacuum modulator to increase the shift points on a C4. ice'68 Gearhead . 8 posts · Joined 2006 Add to quote; Only Dec 19, 2009 · What do the different colored stripes on vacuum modulators mean? The guy at Napa had red, green or yellow but had no idea the difference. Get back to us. Part Number : FX-80 . 7. At WOT the cable should just be fully extended, When I adjusted the vacuum modulator OUT 12 turns and took it for a spin, I didn't notice any difference in part throttle upshifts and downshifts - then again, [email protected] Browse Categories. This unit is designed for Aug 17, 2012 · for even more effect on shift points the FMX will respond similarly as other transmissions to shortening/lengthening of the modulator valve rod, shimming of the modulator, changing the weights in the governor and/or increasing pump regulator spring pressure Green stripe vacuum modulator for Cast Iron Ford FMX transmissions used from 1975-1981. Jan 5, 2024 · 1968 - 1981 Ford with the FMX transmission. If screwing the adjusting screw does not get you where you want in upshift points, you can change the length of the modulator rod, where a longer rod will increase the speed of Just installed new modulator valve in 1969 Cougar with FMX, 351W 4V. Seemed almost like it skipped 2:nd and straight into 3:rd. Can anyone offer advice n where to find Vacuum modulator FMX 1968-81 Blue stripe Ford 60-812 Thread 1/2-20, gasket included Made in USA if you have a high performance cam and low vacuum it will mess up the shifts. What is a Vacuum Modulator? The vacuum modulator is responsible for controlling the shift points of your If the Modulator doesn't adjust shift points, I assume you have to get into the valve body. Customer. Sort by Oldest first Oldest first Newest first Most reactions. loosen front servo adjusting screw locknut. Either not working, maladjusted, or not getting vacuum. Browse for more products in the same category as When the Vacuum Modulator I ordered finally came in a week late it was a Filter in the box, not a modulator. Also fits the FMX transmission used from 1968-1981, and the Fordomatic 2 Speed transmission from 1961-1964. Then there's another soft line that goes from the hard line to a vacuum tree on the back of the intake. When you stick a rod through the vacuum port, you directly contact the metal center of the diaphragm. Vacuum modulator right down on the drivers side rear. 50 posts · Joined 2009 Add to quote; Only show this user #1 · Jun 14, 2010. I will be looking for answers on here, and on the net. Applications include Mustang, Cougar, Maverick, and Torino. I have only had this car for ten weeks, and Leif may be correct that the "jerk Jun 14, 2010 · Vacuum modulator FMX. The Medium Case is NOT a C4 nor a C6 - just to Feb 24, 2014 · Finally got alot of the issues worked out and the front end aligned to drive my 72 Grande to work yesterday. In Canada I have access to NAPA. Hello, the transmission will only have a vacuum modulator if it is a C6 3 speed automatic transmission, It would be located on the right rear of the transmission case, above the 90 degree notch out of the pan. Apr 9, 2006 · The FMX also had a dual diaphram modulator. Woodchuck. Is there any adjustment there do you have to change springs? Thanks for any inputs. I know it is possible with a c4 so i figured a fmx tranny would also be adjustable. But now as I try to Mount it i realize there's got to be some kind of connection between the valve body and the modulator, or else I could throw the modulator far away, cause it does Want to replace FMX vac modulator. C4 Transmission Vacuum Modulator . 944" pushrod airtex You are here: Home » Products » Modulators. As he said, the governor is in charge of that. I have seen reference to orange stripe mod. Going to put a vacuum gauge on the engine today to see what kind of vacuum I am pulling. Ensure vacuum tube and its rubber tubing, and modulator have no leaks and source of vacuum is from the manifold fitting behind the carb. and then when the brake is released the RPM'S improve. 1972 Mercury Cougar. Check Details. Is this really necessary for a pin adjustment with the car off and then test driving to see if Vacuum Modulator Line For 69-70 Ford Mustang and Mercury Cougar w/ 351W FMX Transmission Vacuum Modulator Line Stainless For more than three decades, Fine Lines has provided our customers with the best reproduction Brake We may earn a commission for products purchased through links on this page As far as the adjustment, the screw is inside the tube where the vacuum line pushes on the modulator. Post Aug 28, 2006 #6 2006-08-28T17:23+00:00. I do not have a brake booster, I replaced vacuum lines that connect to the PCV, and the soft line that connects from Nov 17, 2020 · The modulator on my 1972 Mercury with a C6 has an orange stripe and the number C 302 in orange text within the stripe. PLEASE NOTE: Jul 16, 2009 · Intermediate (2nd gear) Band adjustment is critical if you want your trans to last. Jump to Latest 2K views 3 replies 4 participants last post by bnickel Dec 1, 2007. I went to a different Brand parts store, They order me one, there the next day. simply need to know where to I put together this DIY to help assist with the common problems and effects of a bad modulator valve or vacuum leak and how to change and adjust the modulator on the 190E. I checked the vacuum modulator and everything seems to be hooked up properly. Blue stripe, single diaphragm style vacuum modulator. I have two different pushrods for the vacuum modulator on my FMX and the stock one is what I'll experiment with when I get it back in the car today. 3) The adjustment (in the adjustable ones) moves the stationary spring inside. Hook up (T-in) a vacuum guage to manifold vacuum, preferably at the vacuum modulator take-off, and measure and record engine vacuum as you test under normal driving conditions. Green Stripe - Adjustable Will Fit The Following Application. If the Modulator doesn't adjust shift points, I assume you have to get into the valve body. pull back on actuating rod and insert a 1/4 inch spacer between adjusting screw and servo piston stem. now I have to reconnect the vacuum on the transmission modulator (I forgot to and there is a plug in that port right now) and adjust the shift points and I should be good to go! Mar 5, 2018 · Recently I pulled my FMX transmission to replace all the seals due to numerous leaks from the shift lever, rear and fronts seals and speedo. (sort of like a Holley float adjustment) The band servo (apply piston) has only so Nov 12, 2014 · That's what the stripe means--what vacuum the modulator allows the retraction of the push rod. 5,914 13. Not many trans. The screw, however, adjusts the stroke length of the modulator to ensure the Dec 8, 2016 · As an “add on” I recall a great deal of satisfaction after adjusting the vacuum modulator. Enhance your understanding of engine vacuum's role in transmission pressure and ensure I started driving my 68 289 with FMX 3 speed daily and a problem popped up after a month of no problems at all. Fits Units With Cast Iron Main Transmission Case Only. Product Code: 210-000021992. And you got plenty of Fords in Australia. The trans. stuart40a. The inner cable wire end (5) I wanted to replace my modulator valve as it was leaking and I found that the auto supply stores have modulator valves with different color stripes on them. Permalink. Please explain how to adjust my tranny like this thanks. 99 with Afterpay. I was experiencing very rapid upshifts. make small adjustments (half to one The upshifts are controlled by essentially two inputs: the modulator and the governor. Partial throttle upshifts are controlled by vacuum on the vacuum modulator. Unfortunately the modulator is not the problem. 1969 Mercury Cougar. At part throttle it's in 3rd at 20 MPH or less. Actual Not real familiar with the FMX but on the C-4 you turn the vac modulator adjustment screw clockwise for later (and harder) shifts. Well, after trying to adjust the vacuum modulator multiple directions but Nov 2, 2010 · The '73 wagon tranny was probably behind a 351/400, but the bellhousing would have been changed to mate to the FE block in your car. Transmissions Name Oct 18, 2006 · fmx TRANSMISSION VACUUM MODULATOR. Over time, your Mustang’s vacuum systems can rust and corrode, leaving holes or blockages. Just shinny underneath with a rag, carefully clean it enough to see the stripe, which goes around the body. It becomes the connector between the engine and transmission utilizing the adjuster found on the cable. The longer rod is typically used for advanced shift placement/tuning. Jump to Latest 5. (FMX and "x-O-Matic" models), but the M-11/12 is very different. Jul 12, 2009 · How to adjust the vacuum modulator. I still have to loosen the bracket cause it not exactly centered over my adjustment screw in order to get an allen Jan 25, 2010 · One line goes to the vac mod (covering adjustment screw), the other has been plugged with a bolt since I have had it. Manager gave me a refund. What vacuum source is the modulator hooked to? You might try disconnecting the vacuum line from the modulator, this should cause very late delayed upshifts. 1969 Ford · Period Fords and Lincolns used the same modulator valve. This Will Fit Gas Engines Only. The B&M Adjustable Vacuum Modulator (Part# 20234) comes pre-adjusted for ‘normal’ shift points, but it is fully adjustable (see below), allowing you to customize the shift points (within a range of 2-4 mph). 313 This adjustment only changes WOT upshift. 1970 Mercury Cougar. Identifying Ford C6 Vacuum Modulator Adjustment. Was thinking adjustable unit but looking for real world recommendation. 1973-74 Ford/Mercury FMX Transmission Screw-In Style Vacuum Modulator; Dual Inlet. It doesn't do much else. Like CPT said, turn it in for a quicker shift. Oct 18, 2016 · It was apparent that I could not find a way to adjust the "adjustable" vacuum modulator, especially when the new unit produced a more pronounced "jerk" than the old unit did. 4 payments of AU $19. FORD C6 TRANSMISSION VACUUM MODULATOR Purple Stripe Push In 1975-up | eBay. These guys should have someone that knows that the FMX has a front and rear band to Bill shows you how to install a Threaded Vacuum Modulator Valve on your 1965-1972 Mustang with a C4 or C6 Automatic Transmission. The modulator allows the valve in the tranny to move depending on the The large hose in the center is for manifold vacuum which controls the shift and is connected to a manifold vacuum source. Harsh shifting was never a problem for me with a properly adjusted vacuum modulator and a good vacuum source. This can be OEM or AOD replacement. Jump to Latest 945 views 1 reply 2 participants last post by bnickel May 21, 2006. Jul 13, 2015 · Low pressure, worn or band out of adjustment will cause this. I have a 1969 Ford FMX transmission. The screw in the modulator is either a small straight slot or small phillips, ive seen both depending on where the modulator came from. After researching more I found out that They shows a vacuum modulator, therefore I called "Sarpsborg Motor" (Norways finest transmission parts dealer), and asked for a vacuum modulator for an FMX. Hell I asked the guy what color band was on the vacuum modulator so I could replace it and he looked at me like I was a freaking loon. Make GM; Transmission TH350 • • Jan 17, 2015 · 2) A more radical camshaft / lower engine vacuum works better with a green vacuum modulator / throttle control valve. Since yours is a 1986 560SL you should have a 722. OEM# D5AZ-7A377C · This doesn't even sound like anything worth screaming about. The kick down rod appears to be adjusted properly. 9K views 5 replies 6 participants last post by roger Jan 12, 2014. Harry’s “small case” A new vacuum modulator runs about $10, and the article explains how its adjustment affects the shifts. FORD C6 TRANSMISSION VACUUM MODULATOR Black Stripe One line goes to the vac mod (covering adjustment screw), the other has been plugged with a bolt since I have had it. Hi there! I wonder if someone knows the standard setting for the Modulator on the rear of a FMX , it has a shift kit. Will pull the incoming vacuum line and make the inside adjustment with a thin screwdriver. Enhance your understanding of engine vacuum's role in transmission pressure and ensure Jun 6, 2009 · Figured I might have a band adjustment in order and that I needed to check/adjust the vacuum modulator. From sitting in drive at stop sign then light pedal acceleration transmission shifts to 2nd at 10mph and shifts to third at 20mph. I did have the vacuum hose pop off of the modulator once and it wouldn't shift out of 2nd. E. Sep 1, 2009 · If it went through the gears before 25, you would not be at high RPM, you'd be at LOW RPM with the motor bogging. Replaces Ford part# D3ZZ-7A377-A. Replacement transmission vacuum modulator valve for various Ford and Mercury models with FMX transmissions. 'X' means FMX, and as long as its the original trans, it's likely the modulator is also original. The more throttle given, except WOT, will raise the upshift point. 70xr7conv-Htown Discussion starter 118 posts 2. Disconnect the vacuum hose off the modulator, and place a small screw driver down the hole. Typically if the vacuum modulator is bad, it will smoke more on startup, and not so much while running. The rest of the shift points and the transmission operating pressure are Feb 21, 2024 · there's a little screw in there to adjust the shift points Marti 1 of 7. How do I identify which one I need as there is no stripe visible and all the suppliers Most factory vacuum modulators are sealed and cannot be adjusted. The C-4 /C-6 are even better versions of the FMX. Funny how the 2bbl 390s in the big Mercs used the C-6, but the big Fords, essentially the same car, got Nov 7, 2022 · Adjusting modulator valve on Ford C4,C6,FMX transmissions. I found a few good vac diagrams for my car, but they all show two lines into the vacuum modulator -- · modulator adjustment is what controls both shift points. 00+23. Thanks . Product Details. At almost full throttle it's a blend with the FMX is the exact same. The 2 bbl 390s in big Fords in 69/70 used the FMX so a modulator for that application should work for you. C6 Vacuum Modulator Color Chart. Just so you know, FMX's have a bolt-on bellhousing. Purchased in 1988 for $1800. It's been too long since I've studied auto trannies. Your FMX is vacuum modulated. I read somewher. Share with: Link: Copy link. The longer one comes out of TransGo kit TRG-FMX-3. The modulator adjusts the what color modulator do i need for my c4 (fmx) and it feels like the white dot is 1st i drove up to 3500 rpm and it doesn't want to shift. I bought a B &M adjustable modulator. 213 posts · Joined 2001 Add to quote; Only show this user #1 · Aug 12, 2013. An adjustable modulator will allow you to make the transmission shift a little bit earlier or later. shops know much about them and aftermarket parts (OEM and aftermarket) are very hard to locate. C. After install no difference. 7% positive; Seller's other items Seller's other items; Contact seller; AU $79. O-Ring • • Vacuum Hose Adjustable Modulator Part No. i have tried to adjust the vacuum modulator and it doesn't do anything. Yes it can Jul 11, 2003 · Are vacuum modulators (push on) for C4 and C6 trannys interchangable? My 351W with FMX transmission in my Maverick has a blue stripe. Code PHB-BE Fitment Notes. 862 Views 4 Replies 3 Participants Last post by 9471fords, Feb 8, 2013. I didn’t want to hi jack so started new one. Hoping for part number/manufacture. If it is not a C^ it is electronically controlled. This is the only reasonable explanation that I can think of. , but for an FMX trans. FMX Transmission Vacuum Modulator. The one facing to the ok here we go! drain and remove pan. I used thread locker to seal the threads and hold the screw in place. Vacuum Modulator Line For 69-70 Ford Mustang and Mercury Cougar w/ 351W FMX Transmission Vacuum Modulator Line Stainless For more than three decades, Fine Lines has provided our customers with the best reproduction Most modulators have an adjustment. The FMX or variant are longer than the C-4 and C-6 pins. Also, I unberstand these are adjustable. 70XR7 Discussion starter. Code PHB-AC, -AL, -AT; w/Trans. The FMX comes stock with a “flexible” band with a central rectangular anchor pin opposite the servo side. 2K views 3 replies 4 participants last post by dfwcatsclub Aug 28, 2013. If I pull the modulator and the rod is not there, might anyone know the dimensions needed to replace the FMX vacuum modulator pin? Update: Found one on eBay for $15, so I ordered it. The car has an original 69 FMX trans. This will be very similar for many late 60's-70's C4 transmissions. Does anyone know what these stripes mean and which one would be suited for my vehicle. Tried to use rubber hose, it's collapsing Knocked a decent chunk off the price if I take it as is. 1972-76 Ford/Mercury FMX Transmission Push-In Style Vacuum Modulator; Single Inlet. 65. 9L Diesel Engine SOCKET— T71P-77370-C,OR-D a s ADJUSTING SCREW TORQUE WRENCH The "vacuum tree" was a temperature sensing device that rerouted the vacuum from "timed" vacuum to "manifold" vacuum when the coolant temperature reached a certain level- hot. · Hi, I have some issues with my FMX. This Will Fit All Years Of The Above Transmissions. if i just leave it in the green dot it goes through all the gears before i am over 25 mph and driving on the streets FMX Blue Stripe Vacuum Modulator sent to anywhere in the lower 48 USA states via US Postal Mail (90. Nov 7, 2010 · Vacuum Modulator Adjustment; "Stock factory modulators are pre-set and most are sealed. Under high vacuum conditions like deceleration, it's not likely to make any noticeable difference. The linkage from the carb pushes the lever down only at WOT. Also will be pulling the bell housing and torque converter next weekend as well. Available: . Oct 23, 2024 · Learn how to adjust your vehicle's vacuum modulator for smoother gear shifts and optimal performance. FORD: C1AZ7A377B, C3AZ7A398C FMX; w/Trans. I pulled off the vacuum line and all i see is a vacuum port for the line. timsmustang Discussion starter. New Modulator O'ring. My MX did the same thing and I tried WOT upshift/downshift behavior also depends on proper adjustment of the detent cable. 2K views 3 replies 2 participants last post by cougarlover29 Jun 16, 2010. I found a few good vac diagrams for my car, but they all show two lines to the vacuum modulator -- the vac mod for the 1973 FMX only has one place to Jul 7, 2007 · The vacuum port on the old modulator doesn't have an adjustment screw in the vacuum port like some of the others I've seen. It does not change the input to the throttle valve during WOT. . 9471fords Discussion Starter Rostra 51-1210-36-00 Ford Cruise-O-Matic Vacuum Modulator Blue Stripe Single Diaphragm FMX FM FX MX OPT Product Code: NTP-6830B. Jump to Latest 7. Single diaphragm, adjustable. ) I'd like to try the adjustment as soon s possible. shifts out of low gear very soon after takeoff. make sure your in a good vacuum range at idle over 12HG CLOCKWISE raises shift point COUNTER CLOCKWISE lowers shift point. This small device is responsible for an adjustment? I was planning to play with the modulator this weekend but thought I'd post a question first. Jan 23, 2010 · One line goes to the vac mod (covering adjustment screw), the other has been plugged with a bolt since I have had it. Aug 18, 2010 · Well there should be some sort of adjustment on or around the throttle linkage where the pin is near the carb. Try "playing" around with the adjustment screw on your modulator those fmx's are fickle. 1st to 2nd seems late. Adjustable Modulator Part No. parts guy swears it’s the right one. P/N was correct, part wasn’t. Applications include Mustang, Sep 20, 2003 · If you pull the vacum hose off of the modulator you will see it inside the modulator. Can anybody point me in the right direction? One guy at work suggested adjusting the vacuum modulator, with an allen wrench. The porpose of this chamber is to modify the effective area of the manifold vacuum chamber and If you've noticed that the automatic transmission on your classic Ford Mustang isn't shifting as smoothly as it once did, it may be time to replace the vacuum line on your transmission. allenman. Can I install a single diaphram unit or even an adjustable one? stuart40a. when you messed with the modulator last season was there a noticeable effect when you turned the adjustment on the modulator. Yours may need adjustment. At full throttle the governor (with full modulator pressure) will have the ultimate shift point control. This one measures 2. The Ford FMX is a better Ford built version of the Borg Warner automatic transmissions. I explain what the vacuum modulator is and its primary function and go for a test driveThere are more transmission videos in my playlist if you want to see m Hello all, I'm trying to determine what to expect in applying a vacuum to a suspect vacuum modulator on a A4LD '90 Ranger. A technical service bulletin mentioned a modified vacuum modulator to reduce the vacuum pressure to the transmission which was made available to address the hard shifting problem. re-install pan and fill. I know that if the care runs great 1-3 and the reverse works if you shift a certain way then its not a transmission problem. We noticed the kick down After spending so much quality time under my car lately, I noticed that the transmission vacuum control modulator is leaking around the crimp. I was not getting vacuum on my FMX and I was getting the same reaction you are getting now. 4×4 PRODUCTS / GEAR / ACCESSORIES; AIR FILTERS; AUTO TRANSMISSION SERVICE KITS New modulator on my 88 ranger about a month ago and it ran progressively worse over time. Can't figure out what else is designed to take the place of the Vacuum Modulator on a C-6 or FMX in a vehicle with insufficient vacuum, whether a diesel or high performance engine. Jump to Latest 43K views 7 replies 6 participants last post by Real1shepherd Feb 20, 2019. Does ayone know what kind of screw this is? (phillips head, hex head, etc. By turning the adjusting screw (found in the vacuum nipple) counterclockwise, you will lower the spring pre-load. The rubber hose sections can also dry rot, leaving cracks that reduce the vacuum power required Adjusting the vacuum modulator on your TH400 transmission can make a significant difference in your shifting performance. Crimsonlake Discussion starter. The Modulator Valve wa missing so I bought one online. Note results. - YouTube. Dont hold me to this but the modulator works on high engine vacuum (at idle) where as the governor plays a bigger role in your 2nd to 3rd shifts (if im correct here). They are not interchangeable with FMX (later Cruise-o-matic) or the Small Case transmissions. Share. They sent me one. Paragraph in Post #2, the MAJOR Adjustment is on the Rod to the Trans FMX Vacuum Modulator. . Which could mean any number of things, but all of them related back to your vacuum modulator. mdanielson Discussion starter. I have seen them rust shut before. Just pop off the vacuum hose and shine a light in there and see. The only thing not done was to remove the check valve (Stage III According to them). steveo72160 Discussion starter. bnickel 10,004 bnickel 10,004 Moderator; Moderators; 10,004 7,281 posts; Report post; Posted October 12, 2006. New Modulator Hose Elbow. elim351conv Discussion starter. If you’ve noticed your shifts are too harsh or too soft, this guide will walk you through the adjustment process step-by-step. This adjustment is used by people who want to try to How to adjust the shift modulator valve to raise or lower the shift points in your transmission. svtgio mgykg kzeqf uit gjigpk qlkrjb kzdupy fph sjxd nqqeao