Question about 1985 Ford F350

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I just bought a 1985 F 350 1 ton truck, when it is cold the clutch disenguages fine, but when I run it 30 miles and every thing gets hot the clutch does not disenguage as i tv should

Posted by Scott Carrigan on


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Sounds like the clutch slave on the side of the transmission is going bad or leaking.

Posted on Oct 31, 2014


5 Related Answers


Richard Perkins

  • 1036 Answers

SOURCE: While under the car checking

I suggest that the self adjusting clutch cable / mechanism has locked - taking up all the "slack" you gave it.

Check for a ratchet arrangement behind the clutch pedal - or maybe in the cable itself. You may need a new clutch cable fitting.

Posted on Aug 04, 2009



  • 1244 Answers

SOURCE: 1994 expo transmission disenguages when overdrive

the torque convertor clutch solenoid in the tranny is full of junk! / metal shavings starving the tranny from the front pump while in O/D

Posted on Jan 21, 2010


ryan echavez

  • 57 Answers

SOURCE: i changed the solenoid in my 97 ford explorer and


this is the wiring of the basic starter motor , it may have small diffences but the logic is there...

hope this one helps.... :)

Posted on Mar 26, 2010

Terry Long

  • 241 Answers

SOURCE: 1998 s10 v6 4 wheel drive will not disenguage

check your transfer case switch on top of your transfer case.they get stuck sometimes.

Posted on Feb 06, 2011


Steve Christmas

  • 699 Answers

SOURCE: engine "ticks" and misses when cold then clears up when hot, runs fine

Lifters are getting week. When tthe oil gets hot the oil get's thinner makeing it run more freely through lifters.Might try a bottle of sea foam . usually works well .
Good luck with it.

Posted on Dec 05, 2011

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I just bought a 1985 F350 1 ton truck, it has a hydraulic clutch. The clutch disenguages fine when the truck is warm, but when I drive it 30 miles and every thing heats up the clutch does not disenguage

I'm sure you've checked the fluid level, I would first try bleeding the system to rule out any air pockets. It also could be a fluid bypass situation, especially if the master/slave are old or the cup seals have been exposed to contaminated fluid. The seals can become hardened over time and will not expand along with their respective bore when hot. The cure for that is replacement of the clutch master cylinder and/or slave. The master cylinder is a fairly easy task, but the slave cylinder requires removal of the transmission. Bleeding this system can be frustrating, but you should be able to find plenty of information about the process around the web. Good luck.

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Engine "ticks" and misses when cold then clears up when hot, runs fine

Lifters are getting week. When tthe oil gets hot the oil get's thinner makeing it run more freely through lifters.Might try a bottle of sea foam . usually works well .
Good luck with it.

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I have a 1996 GMC 1/2 ton diesel with a 480 L transmision and when it's cold it will not shift gears and the rpms go high if i try to push it ,but when it's warm it's fine.

Since you didn't mention it and I can't just assume the first thing to check is fluid level. ATF expands as it warms up it could just be low on fluid. So warm it up and check on a flat drive way in park. Also, how cold is "cold" do you live in real cold like Alaska, or are we talking So. Cal cold ( 45f ) If it has been 30,000 miles it is due for a fluid and filter change and its a good opertunity to pull the pan down and see if there is any clutch material in it. Also, not that it matters but it is a 4L80 E transmission, it stands for: 4 speed, Longitudinal, 80 series, Electronic. Anyway, the 4L80E is a great transmission but you didn't say how many miles are on it. I have a one ton with 1175,000 and it still works great. so it depends a lot on how hard it is getting used as to haw long they last.

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