9 bolt austrailian rear ends

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07-14-2004, 10:31 PM

CRAZYCHUCK13

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Car: 91 Z28

Engine: 383-Carb

Transmission: TH400/3500 Stall

Axle/Gears: 3.73

9 bolt austrailian rear ends

are all borg & warner parts inter changeable?i have a 2.77 9 bolt & have a partner that has a 3.23 disc brake rear end complete out of a 87-89 gta.my rear end is a 2.77 out of a 89 iroc,i am trying swap diffs & change gear ratio to 3.73 from precision gear.
both rear ends are posi.my question is will all parts be interchangeable? can any one help?
thanks
chuck

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07-14-2004, 11:10 PM

84 1LE

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Car: 89RS vert

Engine: Erod

Transmission: 4L65e

Axle/Gears: BW, 3.27

The posi carriers are different i believe from 2.77 to 3.08 & from 3.23 to 3.73 or numerically higher.If you only want to change the ring & pinion.Youll have to go with the 3.23 diff.Or change the entire carrier from your 2.77.Everything else should be the same.

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07-14-2004, 11:31 PM

IEatRice4dinner

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Car: IROC-Z

Engine: L98 350/ 5.7L

Transmission: 700R4

all 9-bolt parts have to be used with 9-bolt parts, nothing from a 10bolt will work. the 3.23 is not a stock 9-bolt ratio... the stock 9-bolt ratios are 2.77 3.27 3.45.