[89sierra]

hey guys i just bought a detroit true trac and 4.88s for my truck from summit but i was wondering what the true trac needs for bearings because it says it needs over size bearings to put in my 8.5 10 bolt but i can not find anything about them.

 

[SwampThing07]

How much did you pay for everything? Sorry don't have answer to ur question.

 

[axisT6]

Call randys ring and pinion. The true trac is made to fit either the 8.5 or 8.6 10 bolt. That said, you will need a bearing that has a larger ID in order to fit the larger bearing trunnion on the true trac.

 

[89sierra]

i paid 410$ for the true trac for the 8.5/8.6 with 30 spline axles and i paid 180 for the rear gears and i think it was 185 for the front. i guess i will have to give randys ring and pinion a call

 

[BlkSlvrdo129]

Or Ron's machining service, that's who I bought mine from and it came with the bearings and shims.

The bearings were Timken and I think the OD of the race was 3" (or close to it).