Ferocity02

iTrader: (60)

For those of you who have rebuilt T56's reusing the taper bearings, did you aim for the recommended settings or did you go a little loose or tighter?

My main shaft has 0.002 end play, 0.000-0.002 end play is recommended.
My countershaft has 0.000 preload, 0.000-0.002 preload is recommended.
I haven't measured my countershaft extension yet.

This T56 has 80k miles on it and everything inside looked pretty darn good, except for some wear on the 1-2 synchro.

85MikeTPI

iTrader: (9)

I set them up by:

Mainshaft = 0.000-0.002 preload
Countershaft = 0.002-0.004 preload
Extensionshaft = 0.000-0.001 end-play

YMMV

Ferocity02

iTrader: (60)

What is your justification for the tighter mainshaft and extension and looser counterstaft?

85MikeTPI

iTrader: (9)

Ferocity02

iTrader: (60)

Oops, misread your post. So what's the reason for the tighter clearances all around? I understand that new bearings will "open up" over time and the clearances will become looser. But I think these bearings are well worn in and probably won't open up anymore.

Ferocity02

iTrader: (60)

Anyone else? I've gotten a few suggestions and they are all over the place, but all agree that they should be tighter than what the service manual suggests.

85MikeTPI

iTrader: (9)

It's as much the case (aluminum) expansion over the steel shafts as the transmission heats up. New bearings would dictate even tighter clearances.

Ferocity02

iTrader: (60)

Thanks for the help Mike. I did 0.001" preload on the mainshaft and 0.002" preload on the countershaft. I will get to the extension soon I hope.