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C6 tranny. I dont know jack about tranny's

jk656

New Member
Joined
Apr 27, 2004
Messages
27
The one thing I've always heard about auto tranny's is that their impossible to trouble shoot. I was just wondering if any body out there ever experienced this: When the tranny is cold it will not engage into drive. Reverse works fine regaurdless of tranny temp. But any forward gear will not engage until the transmission has warmed up. once the trans is warm it operates just fine.

Well after doing as much research as I could on the subject I decided it would cost more to buy the tools to rebuild the tranny than it would to actually buy a rebuilt tranny.

I would rather do the job my self to gain the experience but unfortunately time and my wallet are against me. This seems to be an issue with the valve body, or the clutch disks. Of course based on what I know about the subject I'm probably just shooting darts in the dark. Any feedback you guys can give me I would greatly appriciate

p.s. yes the transmission has propper fluid level
 

wildbill

Old Bronco Guy
Joined
Jun 29, 2001
Messages
6,885
;D ;D ;D The seal's have goten hard and wont hold the presser till they get hot and a little softer at the trans shop they called it lazy seals. You can try a trans seal softener it can work for a wile.:p :p :p Bill :cool: %) :p
 

BwoncoHowie

C-4 Wizard
Joined
Nov 11, 2002
Messages
3,571
Also known as "Morning Sickness" To be more specific, the seals in your forward clutch pack have gotten hard. Typically the inner seal fails first then the outer one on the forward piston. When this happens usually the other seals are not far from failure. It's best to rebuild it.

Some have been able to buy some time by adding about 3 oz of brake fluid to the ATF and drive it normally after it has warmed up of course. This will soften the seals over time but once it begins to function normally, you must drain out all the fluid and replace with new. If you dont, the chemicals in the brake fluid will continue to turn the seals softer until they can no longer do what they were designed to do, then the trans will fail completely and will need rebuild for sure.~bh
 
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