Can you use the ring and pinion gears out of a 4th gen rear end in a 3rd gen? I wasn't sure if they were the same size. Thanks.

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87 Camaro Z28
LB9 305 TPI, Accel cap, rotor, and 8mm wires, K&N filters
1/8 mile: 9.8@69mph

91 Formula
L98 350TPI, Accel 8.8mm wires, Siamese Runners, Edelbrock Headers, Edelbrock 3" Cat-Back, Airfoil, K&N Cone Air Filter, AFPR, Shift-kit, Mallory Promaster Coil, Nitrous Works Wet Kit 75hp
1/8 mile: 7.9@86mph

 

4th gens all have 10-bolts, so you can use 4th gen gears in thirdgens with 10-bolts. But, there is also the gear size problem. 2.73 and 3.08 gears (called 2-series) only work with each other, and 3.23, 3.42, and 3.73 gears (3-series) only work with each other. You cant put 3.23 gears in a 2.73 rear end, for example, without changing the posi unit for one that works with 3.23 gears.

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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=-

 

Thanks. I have a 3 series carrier and I just bought a 3.42 gear out of a 4th gen just as a quick fix for this ring gear that I broke a tooth off of. It's holding up still but I don't know for how long. Another question...will powertrax lockers only work with open rear ends? If so, would I be better off staying with the posi rear end that I have or getting a peg leg and a powertrax? One more question, someone put a post on here one time that said something about a company making 9" and 12-bolt rear ends for the 3rd gens. What company was this? Thanks

 

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Derek 90 IROC 5.7[/i]
Mods: All the usual bolt ons , 2500 stall , 373's , SS hood , lotta reduced weight.
Best Et: 13.16@101