Why wheel bearings? and it's a limited slip diff. Also I dont know about the splines. Looking at parts and they say 27 spline for the pinion shaft splines but i dont know how many spline =I have on mine.

 

The rear lube was contaminated with flakes of metal that means all bearings that use that lube are questionable. If you go two months and the wheel bearing fails now you are replacing all the bearing again. DO NOT buy cheap bearings. Cheap bearings are made from 1020 steel and case hardened. Good bearing will be made from 52100 steel through hardened.


Good bearings are made by
Timken
SKF
NTN

 

And I have a limited slip so I dont know if spider gears are in there or not?

 

All rears have spider gears from the factory. The only rears that do not have spider gears are lockers and they are for racing. If you are having a Pro rebuild the rear let him tell you what you need.

 

You talking about wheel bearings like in the differential housing on the wheel axles?

 

Yes wheel bearings on in the axle tube near the brakes. Diff bearings are on the carrier aka Diff Housing

 

Question is, does Eaton TrueTrac fit 95 z28? Was looking at getting one.

 

Last I checked they made a tru-trac for the GM 7.5/7.6. Good upgrade, but sorta pricey.

Edit.
Tru Trac
https://www.summitracing.com/parts/d...a317/overview/

Gears if you have 3.42
https://www.summitracing.com/parts/spz-36196

Install kit, minus wheel bearing and wheel seals. This kit uses a crush sleeve, up to you in you want to order a solid spacer.
https://www.summitracing.com/parts/yga-14077

Solid pinion spacer
https://www.summitracing.com/parts/mgr-4111

 

Solid spacer better you think? to buy and get the garage to put it in? Also that trutrac fits 28 spline, mine is 27 and i have 3.42 ratio it fits 3.23.

 

Call Eaton or Summit do not go by what a forum says. No one is going to let you exchange a part because someone on a forum told you it will fit. Do you know who will be doing the install? Many shops will not install carry in parts and they are sure not going to give you a warranty on the rear. Many will also not do non-factory processes they have not done before (meaning the solid spacer).

To a pro there is no advantage to the spacer on a street car. The only real advantage is they are a little easier to install for non-pros and they can be reused. But a pro that has been installing crush bushing for the last 20 year may not want to install a solid spacer.