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#1 |
Registered User
Join Date: Jun 2013
Location: Grand Rapids Michigan
Posts: 291
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TH400 rebuild: Output shaft difficult to turn
Hey all, I'm in the middle of rebuilding my 2wd TH400 and everything is going great except for the fact that I can hardly get the output shaft to turn by hand. Even with none of the clutches installed it was pretty difficult (requiring 2 hands), and now that everything but the pump is installed I can't get it to move without a lot of grunting and cussing.
My guess is that the tailshaft bushing isn't installed perfectly straight, or maybe it has a bit of a lip from when I installed it. Either way, do I have to rip this thing down and start over? Or is this considered normal? Tailshaft end play is in spec, so I don't think it's binding laterally... Thoughts?
__________________
My build thread: http://67-72chevytrucks.com/vboard/s...96#post7439296 |
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#2 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,554
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Re: TH400 rebuild: Output shaft difficult to turn
What about the reverse band being a little out of center?
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#3 |
Registered User
Join Date: Oct 2015
Location: Spokane, Wa
Posts: 112
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Re: TH400 rebuild: Output shaft difficult to turn
I’ve got turbo 400 rebuild issues too haha. Just drove mine and it was super doggy and after a while it stopped rolling backwards. Even with the vehicle off, in neutral the truck will not roll backwards anymore. What a disaster lol hopefully there’s some 400 gurus on here.
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#4 |
Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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You have to install the center support to the output shaft as a unit when lowering it down into the case.
[size=1]Posted via Mobile Device[/size Once you install the center support beveled snap ring and the the output shaft is hard to turn pull everything back out and install as one piece. Trust me.... |
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