Transmissions and Drivetrain Need help with your trans? Problems with your axle?

9 bolt strength

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Old Apr 24, 2007 | 06:19 AM
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F-Body Demon's Avatar
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From: Nashville
9 bolt strength

Hey yalls! I have a BW 9 bolt in my 85 T/A and I was wondering about how much she can hold. I've got a 406 SBC bolted to a 700r4 with a high stall convertor. I have heard it can take 11s is that true? Im looking to make 500 ft/lbs.
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Old Apr 25, 2007 | 12:02 AM
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Kevin91Z's Avatar
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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
Re: 9 bolt strength

A search of this forum for "9 bolt strength" will give you all the info you need.
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Old Apr 25, 2007 | 12:06 AM
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TON*LOC's Avatar
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From: sioux city iowa
Car: 1987 firebird trans am
Engine: 305
Transmission: 5 speed
Axle/Gears: 4th 10 bolt hope fully it last
Re: 9 bolt strength

it will hold
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Old Apr 25, 2007 | 01:30 AM
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Re: 9 bolt strength

I did search this actually and didnt find anything conclusive. Srry.
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Old Apr 25, 2007 | 02:05 AM
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Orr89RocZ's Avatar
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 9 bolt strength

i broke the spider gears in my unknown mileage 3 series carrier with a 1.7x 60 foot. many 1.8 60's on slicks and small stall on stock L98.

however... this is not the norm... decent condition they should hold. i have heard that the owner of 9bolt.com has had a big block infront of his 9 bolt and that thing was puttin down the power
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