Alright so right now on my z28 I got what I beleive is 3.23 stock gears with I knwo for sure is an open differential...Now my question is that a member on this board is selling a POSI unit with 2.77 gears will that make a noticeable driving difference if I installed it on my car..?

Also there is another person who is also selling a rear end of a 2001 WS6 3.23 gears POSI, with disk brakes but my problem is that I have 15" rims and will I even have enough clearance for the disk brakes to fit?????

 

To me the limited slip isn't worth swapping to highway gearing. You'll lose some grunt.

JamesC

 

The 2.77 is for a 9 bolt. If you have a 10 bolt then it won't fit.

Be careful when you buy a used Auburn differential. Most of the time they are either worn out or close to it. When they wear out they are scrap metal. They can not be rebuilt. The 4th gen cars used the Auburn up through '97. After that they used the Torsen, which is a much better unit.

 

Alright guys so mi most likely gonna go pick up that 3.23 POSI but im not sure if my 15" rims will clear the brake calipers?

 

its time for new rims lol

They will fit 15" ...But .. you have to grind the calipers ...no grinding then 16" or larger wheels

 

how much grinding we talking bout??Not enough $$ for 16 inch or bigger rims.

 

Im not sure you have too do that on your part as I dont know your wheels

but its not much that will make the caliper fail

the grinding will be to the top I believe theres a couple fins

 

Alright so I ended up choosing the 3.23 POSI off from the WS6 I took all the grease off it, re sprayed it with black paint and now Im am trying to figure out is the brake lines and the ebrake line....do they all hook up to my existing lines?

 

Try searching alot of info out there

https://www.thirdgen.org/forums/faq-...-gen-rear.html