I need to know what the correct bearing size is for the front rotor/hub assembly for the out bearings on my 92 z28 350 J65 optioned car. Either an a-34 or an a-3. The inner is an a-6. Ive been to 3 or 4 different parts stores and im getting a lot of blank stares. Im thinking that the a-34 is the six cylinder bearing....no?....My car has the j65 option and I dont know if that is what their computers are calling a performance package or if that means the 1LE package. According to autozone the performance package has a larger rotor which measured to 11 and 5/8ths inches. Does the J65 option give larger front rotors? I bought this car and I dont know a lot about its history and I about to have a complex if I dont get this figured out. There is play in the hub and I know that I have it all torqued down(the 12 ft/lbs and then backed up) and its not in the steering components. HELP ME!!!

*****["I have some confirmed offset figures for scrub radius between the different brake setups. All figures are measured with a factory 16" "Fronts" Iroc rim with the standard offset of 0mm.
Measured from the spindle mount hole for the 1LE bracket going outward.
----------------------------

Standard Non-1LE front -small bearings(10.5" rotor)
3.630"

1LE brake setup- large bearings (12" rotor)
*THIS IS THE FACTORY STANDARD FOR 245/50-16 tires on an 8"wide rim*
3.948" [+.318 offset, or just over 5/16"]******

I pulled this front the wheel fitment sticky. So it says standard has the small bearings (a-34). But then it says that the other has large bearings if the car came with 16" wheels which it did....im so confused....

 

ok so i worked it a little more and now its not wiggling much if at all. I just backed the nut out a little bit after torquing to 12 pounds and spinning and re torquing instead of making the nut loose and then snug it with your hand. That goes against my shop manual but everything feels fine when it spins...

 

1LE= performance package=Set 3; all others are set 34 outer. All use a Set 6 inner.

Ed

 

Thank you very much sir. Did you get my pm?

 

Yes but I haven't replied to it yet, I will tonight.

Ed