I have a 91 formula WS6 with 305 TPI and T5. The car is stock right now. What rear end gears do I have? Posi?

Thanks

 

Nobody knows what came in their car? I just want to know the rear end gear!

 

If you werent so lazy and actually did some research you'll find that the info is right on www.thirdgen.org main site !

 

Sorry, but thanks for pointing that out to me. I'll make sure I look around before asking next time.

 

If you've got a single cat, its a 3.08 posi. If you've got dual cats, its a 3.42 posi. Another way to tell is if you disc or drum brakes. Disc brakes usually means 3.42 and drum brakes means 3.08, but 91 is a weird year due to the disc brake shortage. But the single/dual cat method is fool-proof. Also check your RPO code sticker in the rear locking storage compartment for codes that start with "G". G80 is positraction, GU3 is 3.08, GU6 is 3.42.


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

I have stupid drum brakes on the rear. I don't know if it is typical of thirdgens or what, but my car doesn't stop very well. I had the brakes looked at (I have never worked on drums) and the Midas guys said they were perfect. They were cool and didn't charge me anything, even though I took up about 45 minutes of their time. I have dual cats, though. Thanks for the information.

 

Ok then, the dual cats mean you have 3.42, and the drum brakes mean your car was built during the disc brake shortage of 1991.

 

Not to be a **** , but I kind of gathered that. Thank you very much, though, for the information, man.