Question about 1982 Ford F 350

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1982 F 350

Auto trans downshifts as i slow down A service has not fixed problem

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Im not sure which tranny you have,but i would check to see if the throttle valve cable is stretched or needs adjusting.( if applicable) or check the modulator valve and vacuum supply line to the valve...Good Luck...

Posted on Sep 15, 2008


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My 2001 cadillac catera has unwanted downshifting when not on level roads

Yep that\'s what auto trans do. it tries to do engine braking, just don\'t accelerate at all. When you go down hill in a manual gearbox, you would also have to downshift to let the engine do the braking.

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It is most likely that one of the transmission accumulators has failed, usually due to a broken spring in it. These are rather like little hydraulic shock absorbers which cushion the ratio changes in the trans. You would be best taking it to a trans shop. Here is a photo of accumulators lined up with their locations in a typical trans

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Mar 18, 2013 | 2001 Chevrolet Silverado 2500HD

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2005 ford five hundred limited 2wd 6spd trans 139k miles. Recently replaced mounts thinking that would stop the trans from downshifting hard at stopping. But since the replacement the rpm will not go over...

What you might try is changing the Trans fluid and putting in a new Trans filter or cleaning the filter if it is not disposable. If this does not help before replacing parts on the Trans ask if your Model has a Software fix.

Many of the newer vehicles have computer programming to control the Trans behavior. Since changing the mounts made a difference, the old parts were obviously worn. Now you need to smooth out the shift points.

If you want to try 1 cheap part, get a TPS (throttle position sensor) which is on the Airhorn. Its function is to set fuel mix and timing advance and to communicate that to the Trans. If the Trans does not know how far the throttle is open, I can see it would not know when to shiift or downshift.

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'93 corolla,4 trans.speedometer reads10 mph slow and the transmission shifts real fast.Its in third gear bythe time u hit 30 mph. Also wont downshift at this point either.

well what you want to do is change the trans control solenoid or the trans modulator.i know this car has a trans modulator but im not sure that it has a trans solenoid.either way it's a lot cheaper than changing the trans.hope this info helps. take care and good luck, manny

Apr 10, 2010 | 1993 Toyota Corolla

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95 Ciera wont downshift when hot and coming to stop

Does it kill the engine? The th125 transmission is know for converter clutch solenoid problems.

May 25, 2009 | 1995 Oldsmobile Cutlass Ciera

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Auto trans grind when shifting from 1st to 2nd and downshifting from 2nd to 1st

Check the fluid! Had similar problem, $0.87 in fluid fixed it.

May 07, 2009 | 2000 Jeep Grand Cherokee

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Auto trans will not downshift automaticly

Educated guess: Sounds like a shift solenoid or a speed sensor gone bad. Search a Ram truck owner forum (start witha  Google search) to see if it is a common problem.

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300m special Code P0700

This is what sets the code.

Engine started, engine running, and the PCM received a message over the CCD bus from the Transmission Control Module (TCM) that it had detected a problem and set a trouble code in memory. This code sets in 1 Trip(s).
The presence of this code means the TCM detected a problem. TCM related sensor is damaged or has failed.

After everything you have done I would recommend taking it to a transmission shop, I'm sure they have seen this on Chryslers. and know what the common problems are.

Jan 25, 2009 | 2001 Chrysler 300M

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