3:45 9 bolt

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Jul 26, 2001 | 10:55 PM

86 sports coupe

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Joined: Jul 2001

Posts: 334

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From: Noblesville In

Car: 86 sports coupe-83 berlinetta

Engine: 5.0 in the sports coupe-350 in the berlinetta

Transmission: 700r4 in the sports coupe-turbo-350 with a 2500 stal in the berlinetta

3:45 9 bolt

How much abuse can a 9 bolt handle?
What cars where equiped with a 3:70 9bolt?

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83 berlinetta currently 350/350 3:42 gear,2500 stal,3inch exhaust,2 1/4
exhaust manifolds,comp cam 268,performer intake
L69 dual snorkle aircleaner 3160lb

Jul 27, 2001 | 08:47 AM

327 firebird

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Joined: Nov 2000

Posts: 191

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From: Mass.

The 3.70 gears in a 9 bolt are only made by aftermarket companies like rieder racing. They never were made by the factory. 3.45's were the highest ones you can get. The 9 bolt can handle a lot. Well at least I've never had a problem with it with 400 HP. It is the stongest rear for the third gen cars except for the 25 firehawks made in 92 and the 6 in 91 which had the dana 44's

Jul 28, 2001 | 02:16 AM

Kevin91Z

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Joined: Jul 1999

Posts: 10,950

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From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

Recent information has come up that the 3.70 ratio was available in Trans Am in 85-86, the L69 cars with 5-speeds.

9-bolts are really strong. They can handle 11 second cars easily.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
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