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Can you change TH400 spline?

And on a side not. when you go to replace the output shaft take your time if you have never done one. You have to go down to the low/reverse drum if I recall which means a complete tear down...
 
yup, a complete rebuild is perfect at that time. You will be down past the planetaries, and at the bottom of the case.

Youre going to have it COMPLETELY disassembled to get the new shaft in. The only thing left in the case will be the thrust washer in the very bottom.

Time for a TH400 rebuild thread with photos!
 
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