C4 transmission only has reverse. assuming clutch material.

C4 transmission only has reverse I recently moved to Tucson AZ and am trying to find a local transmission shop to do the repairs. This Tech Tip is From the Full Book, HOW TO REBUILD & MODIFY FORD C4 & C6 AUTOMATIC TRANSMISSIONS . reverse works ok. Even replaced nss and still only starts in rev. C4 transmission has no reverse. Aug 31, 2022 · I only think that because I can see transmission fluid moving just a tiny bit. It's a reverse manual valve body with a brake and a 5600 stall. a bad seal on the low / reverse servo can cuase a gradually worsening late application in reverse. Part of this "may" be caused by what has to take place to change directions. For low pressure in reverse only check for a leak in the high/reverse clutch or servo. '72 C4's had an additional port on the right that is tied to the direct clutch. Mar 26, 2010 · Pull the transmission back out and verify that the front pump gears are toast (inner one broken) from being in a bind due to the misallignment. It has all 3 forward gears, neutral and park but no reverse. You could make sure that your accumulator for the low reverse servo was in the stock configuration, try adjusting the reverse band snug and then back it out 2 1/2 turns instead of 3 turns, the direct clutches may have worn enough that they are too sloppy and allowing reverse to "bang" into gear. also noticed the input shaft has some twist to it. Aug 10, 2022 · To achieve reverse gear the Reverse/High (front) Clutch & the Low/Reverse (rear) Band have to be applied simultaneously. Reverse has the highest reaction to line pressure of any of the "gears" in the transmission. I have searched the forums and didn't find anything specific to this problem. Shifter/ tranny seems to be aligned correctly. Jun 8, 2011 · Not on a C4. With linkage disconnected, then attempt to neutral the trans and engage forward gears. I cannot afford to send the truck away to replace the clutch set so have decided to drop the transmission using the help of 2 other guys, though I only have truck type axle stands. But TransGo has a reprogramming kit for this early transmission & the Sonnax Servo is a great upgrade! With your 4. After starting w/ wheels off the floor, I can shift through all gears watching wheels. I've been hoping this is the problem but testing has me doubting it. If I understand correctly, in reverse the reverse-high clutch should be applied and the low-reverse band should be applied. So I'll start with the air checks. If you have reverse, the Rev/High clutch & Low/Rev band are being applied. Park, neutral and the drive gears all engage correctly but the trans just slips when placed in reverse. The Low-Reverse servo had a cracked washer/spacer that made the shaft wobbly and there were spacer fragments in the tranny. Sep 6, 2013 · I'm loosing my marbles Rebuilt my C4 and have no 3rd gear I have reverse 1-2 and that's it Pulled and cleaned VB 3 times did all air checks and adjusted the bands! Still no third VB is stock with shift kit and trans has 5+5 packs! Governor makes Fart sound and linkage is good too. Mar 18, 2022 · Your C4 transmission works by using something called planetary gears. 089 bit per instructions. High Idle speed creates higher line pressure and that increases harshness even more. The transmission has to be at normal operating temperature & the car parked on a level surface for an accurate reading. On getting underneath to inspect, I could see that the kickdown link arm had detached from the shifter because the securing e-clip had come off. Aug 3, 2023 · It depends on the year of the transmission you have. Jan 16, 2011 · Here's my problem, plenty of reverse but no forward. I do have the vacuum modulator hooked up but I have a new one I plan to put in. It will always be worse in reverse so check carefully. 1966 Coupe 351W Top Loader Apr 20, 2014 · I lost all forward gears in my c4 was on boost all the sudden the gearbox was like in neutral. Oct 29, 2014 · So I just finished installing a c4 behind a 427w and I have a concern. Dec 23, 2013 · If I understand correctly, in reverse the reverse-high clutch should be applied and the low-reverse band should be applied. Dec 23, 2013 · Intermediate band adjusted to 1 1/2 turns out from 10 ft-lb and low-reverse band to 2 turns. As I said in post #5, to get 1st gear in D only the forward clutch is applied, nothing else. I have the car up in the air and tried going through all the gears, park reverse neutral first and third work fine but second it will not spin the tires. Apr 15, 2013 · My beloved blue bertha 1979 F100 Custom lost all forward drive about a week ago with only reverse working (with some chatter). Biggest problem now is no reverse. Aug 20, 2008 · No Reverse: If you have no reverse but still have all the other gears working fine (including high gear) then you are the lucky one! This is a relatively easy problem to correct and it can be done with the transmission in the car. Also when I slow sown in drive or reverse the car starts to shake really hard but when I put it in neutral or park it stops shaking. Apr 15, 2013 · Having read various forums over the weekend, it seems likely that the forward clutch set has burnt out (probably because the kickdown shifter wasn't connected). i had the torque converter rebuilt by a performace torque converter shop in my area. If it is unknown, then maybe you have the early "green dot" transmission as Hemi killer suggested. I have a new reverse band piston on the way. any recommendations as what to do next what parts should i reinstall ? Jul 6, 2009 · 1961 - 1966 F-100 & Larger F-Series Trucks - C4 transmission trouble (no reverse). Dec 12, 2005 · C4 Transmission Problems. This was used with the Transmission Regulated Spark system but the port is undrilled in later years. Now the box has kevlar bands and clutchs plus bigger input shaft bigger bearings and all the rest, the only thing i can realy think of is it might be the rear uni? any help would be great. Oh Yeah! Welcome to the Forum. I have tried several times to adjust nss in neutral with . They're really a fascinating piece of engineering, as you can get different speeds and even reverse the direction of rotation depending on which part of the gear mechanism you direct power to and which part of it you hold in place. Reverse works fine but drive doesnt. If it is only in reverse then there can be two causes: 1. Any info would be greatly appreciated. Does the transmission shift late & hard in forward gears? Also a symptom of a missing vacuum signal to the Nov 2, 2006 · The bang into reverse is caused by too little cushion in the shift or too much clearance. Oct 31, 2018 · It will move just a little in all forward gears when I hit the throttle but then nothing, reverse is fine. Jan 21, 2021 · Will only start in reverse. I'll post a duplicate thread in transmission section just Apr 9, 2005 · Problem solved-I just finished reinstalling my rebuilt C4 and my rebuilt 250I6. Aug 14, 2002 · C4 and C5 are essentially the same trannies with just an extra timing module in the C5, so it's not surprising that the bands interchanged. as i drained the gear box there was some very vicious silver anti seize colored stuff in the gear oil. Jul 1, 2005 · I have just fitted a new C4 and when i go from first to reverse it has a clunk. Feb 6, 2010 · Quick test is to pull the VB and follow the air-test procedure in the shop manual. Now that covers all the actuating components in the C4. The transmission has: I have only been working on these transmissions for 40 years. Seems good. There is a pump port on the front left. If the line pressure to apply both of these ist too high you will experience a jolt while dropping into reverse. Jan 7, 2011 · If you have trouble in both then it is time for a rebuild because the high / reverse clutch is applying slowly giving your symptoms. Sep 10, 2002 · With the car level (front on ramps, rear on stands), check ATF fluid level and operate vehicle in reverse (since it works) for a few minutes. Nov 27, 2000 · Proper specs for a C4 are (transmission warm and engine idling): Neutral: 50 to 90 psi Drive:60 to 90 psi 2 or 1: 90 to 110 psi Reverse: 150 to 180 psi If its too low or high in all or any gears then you have to start looking further. 10:1 rear end that thing is going to go like a raped ape! Sep 17, 2008 · the problem i have is i installed a c4 transmission in my 66 mustang replacing one that would not shift into reverse or 3rd gear. Pull the transmission dipstick & recheck the fluid level. . The filter looked fine but I have a new one on the way to replace it anyways. - Truck is running and a few bugs have been worked out. Thanks in advance. It still shifts great and reverse Feb 8, 2021 · Hey so ive been driving my 1965 mustang 289 for like a week and it just started this thing where it only goes into drive when the engine is hot. So if I have reverse and 1-2 the direct and 1-2 drums should be Dec 20, 2018 · I need Greg to "have my back" on this because I am going from memory. Newly rebuilt transmission and new torque converter, stalls at 2800. now i have filled the tranny with fluid and tried to run it through the gears. assuming clutch material. Do you know what might be the Nov 8, 2018 · Warm the transmission up with a road test. I know this is a 61-66 forum, but to be honest most of my help has come from you guys. I did this before I installed the transmission and everything seemed fine. Dec 21, 2020 · With the process of elimination. Reality is that if it is bad you have to pull it all apart and find it's either the sealing rings on the front pump or the seal on the piston. With the engine running, does the transmission engage when you put it in drive or reverse? If not, immediately shut off the engine and check the transmission fluid level. Park the car & shift through each shifter position "slowly" twice ending up in P. Thanks John. If you have 2nd gear, the forward clutch & the intermediate band are being applied. Mar 31, 2005 · Only show this user #1 · Mar 31, 2005. We contemplated yanking the C4 out of my sporstroof project, since it's slated for an AOD, but figured I'd rather have the stronger '70 tranny that's currently in my son's car, and I decided it would be faster/easier to rebuild the current one than to yank Jun 15, 2015 · I have a 65 Comet, 289 with a C4 that won't shift into reverse. Its a 77 model C4 with the VB modifications. sbmzak ade bxhwule vevkpy nitmzkv siw jqmq iwgfote qbhl vch