TH400 rebuild: Output shaft difficult to turn

[JMD]

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?

[kwmech]

What about the reverse band being a little out of center?

[72k20Farmtruck]

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.

[YoungPup1977]

You have to install the center support to the output shaft as a unit when lowering it down into the case.
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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....