I believe its the open differential right? Forgive me if this is a stupid question. Is limited slip the same as posi? Whats the difference between them? How much (estimate) would it cost and how much work is it to switch from open to posi and throw in some 3.42 gears?

 

Yep, just about all TBI RS's got open differntials. Limited slip and posi are two names for the same thing.

To get posi on your 91 RS, head over to SLP at http://www.slponline.com/ and purchase their takeoff Torsen posi for $100, then go to www.camaroz28.com or www.ls1.com in their classified ads section, and purchase some used 3.23 or 3.42 gears from a 4th genner. Then you'll need to find a good shop to install and set up the gears, because its tricky and not something you can do in your backyard. Good luck!

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Damn i love this site kevin you just answered all my questions i have a 91 Rs and am going to pick up my 3.42's this weekend.. will post for you on cost and how hard it was...

 

do you know the part number to that posi i cant find it i need to buy it....

 

i am an idiot found it 99.95 dollars part number 64501T!!!

 

One more, you'll also need the speedo gears for your transmission so your speedometer will read right. They can be found in the FAQ here.

 

can we put the gears to fix the speedo ourselves or is that a shop job too?