T-case tech question

[DieselFJ]

I am just finishing up a t-case rebuild, and I am setting the pre-load on the rear output shaft bearing. I noticed that I cannot get within the spec of the FSM. With no shim I am under the specs(8 inch pounds) and with the smallest shim I am over specs(28 inch pounds). Specs is (13 - 21.4 with new bearing) and (6.1 - 10.4 with used bearing). I have a new bearing. Would it be better to be a little over or a little under? I was thinking over since it is a new bearing, but I thought I would see what others thought.


Thanks

 

[Poser]

I would try and find the correct shims in order to get it nailed.


Where are you at?

 

[Bret]

I apologize for Hi-jacking but I have similar problem with my H55/split case, with all gaskets and the shim its very tight, with gaskets and no shim very loose, but with no gaskets and no shim its "just right". With shims $20-ish each at the local dealer I was hoping to get the right thickness the first time. Any ideas on a starting point, or cheaper alternative? How thick is your shim? If mine is thinner your welcome to it, ... for a split case anyway.

 

[nocents]

It is VERY importan to get it right! Bearings don't last long if not properly loaded. Measure the shim thickness your "small" might not be the smallest. I have some left overs if they can help I'll dig them up.
Nocents

 

[tobydog]

yes

Bearing needs to be lubed lightly. You might try asking a bearing supply house about generic shims. If you can't get it perfect go looser. Binding causes scoring which is a death sentence.

 

[DieselFJ]

I think once I get a little lube on it then check the preload it shoud be just right.

Thanks

 

[peesalot]

if you already tightened it up at the 28 in. lb . setting then thats it. if you take shim out now the race will still be pushed in and future readings with less shim may be wrong if you don't find a way to loosen race.