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Old 02-07-2007, 05:08 PM
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TH400 Rear Seal

How big of a pain is it to replace the rear seal on the TH400 Chevy Trans?
Can I replace it without pulling the transmission out of the truck?
Any remarks or places on the web to show how would be helpful.
Thanks
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Old 02-07-2007, 06:02 PM
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Just remove the driveshaft, not a big deal.
Look here for some TH400 pic's during a GV OD install. You don't have to remove the tailshaft housing. But check the mount and look at the bushing inside, if it is high mileage pull it and take it down to the tranny shop for a new one.

Last edited by 71C10; 02-07-2007 at 06:22 PM.
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Old 02-09-2007, 07:20 PM
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Thanks for the information
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Old 02-09-2007, 08:16 PM
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Quote:
Originally Posted by 71C10
But check the mount and look at the bushing inside, if it is high mileage pull it and take it down to the tranny shop for a new one.

what 71C10 means is if the bushing for the drive shaft yoke is worn out a new seal may NOT seal..... a tranny shop could install a new bushing and seal ...


you don't need a new tail housing.. that's the way I read the post... YMMV

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Old 02-10-2007, 11:30 AM
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Quote:
Originally Posted by Crosley
what 71C10 means is if the bushing for the drive shaft yoke is worn out a new seal may NOT seal..... a tranny shop could install a new bushing and seal ...


you don't need a new tail housing.. that's the way I read the post... YMMV

Yes, Crosley knows what I meant! Sorry if there was any confusion.
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