Do you need the vin to look it up. The thing is I wanna get some parts for it but the car is about four hours away so I can't go look. Its a 92 RS with out the performace rear end. So would that be the 7.5" GM 10 bolt?

 

GM stopped making the 7.5 a few years earlier. It will be a 7 5/8" with 28 spline axles.

With a V6 it will have 3.42 gears if it has a manual tranny and 3.23 gears if it's an automatic.

If it's a 305 V8 it will have 3.08 gears with a manual and 2.73 with an automatic.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

I thought that the RS's with the autos had the 3.08's and the manuals had the 2.73s? What would you recoment for gears then or would you swap the whole rearend out?

 

Is that true about the rear end gears for auto and manual being 2:73 and 3:08 respectively? I always thought that 3:08 were the standard, auto or manual?

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'85 Z28 Copper/ Gold, LG4
dual snorkel w/ ram air, Accel Cap Rotor and 8MM wires, Edelbrock Headers, Catco Cat, Flowmaster 80 series
American Racing Wheels. 350 crate in the future.

 

The 2.73 and 3.08 thing is for TBI V8 cars only. Automatics come with 2.73 open rear ends, and manuals come with 3.08 open rear ends.

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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
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Webmaster: SoCal F-Bodies
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