Which of these two rear ends would be stronger? (12 bolt vs 9")

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Jan 30, 2002 | 01:06 PM

mult68

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From: Carrollton, TX, USA

Car: 1992 Chevy Camaro RS

Engine: 305 TBI

Transmission: T-56

Which of these two rear ends would be stronger? (12 bolt vs 9")

prices/info from Spohn.net

Moser Engineering - 12 Bolt Rear - Complete:
US Gear/Eaton Posi - 33 spline
T/A alum perf. rear cover
Non C-Clip Rear
3.73 Gears
Swaybar Install Kit
$2,365.00

Moser Engineering - Ford 9" Rear - Complete:
Auburn Posi - 31 spline
M/E Thru-Bolt Aluminum Case
3.70 Gears
Swaybar Install Kit
$2,430.00

Not much of a price difference....this will go on a 383 SuperRam engine with a T-56 tranny.....mostly daily driven....some drag racing and some autocrossing. Which rear end would you recommend and why?

Jan 30, 2002 | 03:11 PM

Tom84L69

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Joined: Jan 2001

Posts: 1,108

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From: Kalamazoo,Mi,USA

Car: 84 Z28

Engine: L69: cam and porting

Transmission: T5, 3.73 rear

a 9 inch is stronger, but does have a higher parasitic loss than a 12 bolt. In reality, you'll be happy with either one.

ps you can get pretty much whatever ratio you want for a nine inch.