transmission problem - experts here?
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transmission problem - experts here?
hello all - I have a '78 f350 460 auto. Got it from a friend and knew in advance it had trans problems. I have the engine running great now, so it's on to the trans prob. Was told it would go in reverse no prob, and only sometimes in forward. I got the engine running good - banged into reverse just fine - and forward did nothing. After shifting back and forth a few times, here's my current deal: When it's in park, the engine revs seemingly like the trans is in gear, ie. won't rev freely. Truck won't roll, it IS in park. I can drive in reverse and forward, but when I give it gas, it clunks/bangs very hard and moves, then acts like a brake - so I get a bang/move/brake, bang/move/brake etc. - all the while I'm not on the brakes and I'm steady on the throttle. I know my around a vehicle EXCEPT for an automatic, so I'm perplexed. I haven't been running it very much, just enough to try and get a diagnosis. I'd get it rebuilt (by me, first time trying) but then I'm not so sure it wouldn't be the torque converter.
Any help is sincerely appreciated.
Mike McLaughlin
Any help is sincerely appreciated.
Mike McLaughlin
Cross-Country
Joined: Feb 2003
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I always check the simple things first.....what comes to mind is your E-Brake stuck on or dragging?
My experiance with C6 transmissions is that when they finally do go they wipe themselves completely.
just a thought cuz when the E-Brake is on it will back up ok but will feel like something in the drive train is bound up when you try to drive ahead.
My experiance with C6 transmissions is that when they finally do go they wipe themselves completely.
just a thought cuz when the E-Brake is on it will back up ok but will feel like something in the drive train is bound up when you try to drive ahead.
Senior User
Joined: Jan 2003
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From: usa
It sounds like the one way clutch and Some other things. Needs to be rebuilt or just get a used one and stick in there. If the one way clutch is not working then all the gears are trying to fight each other when you try to go forward.
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From: Midvale, Idaho
I got my C-6 rebuilt in 1998, down in Louisiana. It cost me $750. That included a better sprag and a transmission cooler. It has about 5,000 miles since rebuild and I've had no troubles with it. It does a good job but someday I hope to replace it with a 5-speed.
Posting Legend
Joined: Sep 2001
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Always use a new or reman torque converter on a rebuilt tranny.
ALWAYS install an inline filter:
Wix transmission/PS filter #58964
200 psi working, pressure relieved, magnetic
change yearly or 12000 miles
Ford equivalent filter kit #XC3Z-7B155-AA
filter alone #XC3P-7B155-BA
ALWAYS install an inline filter:
Wix transmission/PS filter #58964
200 psi working, pressure relieved, magnetic
change yearly or 12000 miles
Ford equivalent filter kit #XC3Z-7B155-AA
filter alone #XC3P-7B155-BA
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Joined: Aug 2003
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From: Gonzales
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Thanks for the replies - sorry I haven't been in a while - computer probs. On the last reply - could in fact the torque converter cause some/all of the problems listed? I wouldn't mind tackling the tranny rebuild myself, but I'd hate to do all that and still have the problems - and wonder then if I did it right, or is it the TC. $100 for a rebuild kit is fine, but it's another $100 or more for a TC. Thanks again in advance,
Mike
Mike
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