how to check rear end.
10-16-2011, 10:13 PM
#1
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Car: 89 firebird bone stock for now
Engine: 2.8L V6
Transmission: 700R4
Axle/Gears: B.W 9Bolt 3.27 Posi
how to check rear end.
i wanna know how i can check a posi rear end thats off a car to see if it works or if its bad without putting it on my car. if its possible can someone please let me know. i probably have to test it by installing it and using it huh?
thanks guys -Aaron
thanks guys -Aaron
10-16-2011, 10:43 PM
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Car: 1983 z28 H.O. Camaro
Engine: 305 rebuilt carbed. .030
Transmission: T-5
Axle/Gears: 3.73
Re: how to check rear end.
I'd like to know too I'll stick around..
bump
bump
10-16-2011, 11:26 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: how to check rear end.
You use a torque wrench on one end to see how much torque it takes to break free.
10-18-2011, 02:15 AM
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Engine: LO5
Transmission: 4L60
Re: how to check rear end.
I have heard that recommended in the past. Do you know what breakaway torque means the posi is shot? I get that a lower number is worse, but what do they spec at new?. Different for an Auburn vs. a BW unit?
10-18-2011, 08:31 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: how to check rear end.
I had to dig up a few old service manuals. I can't find a specific torque for the 7.5" diff but from what I've found, something from 150-200 pounds of torque is considered normal. I think if it's less than 100, you can consider it worn out. Even very old (pre 1970) locking diffs had a low rating of 80 but that could just be because of the old design.
I can't find a specific torque for the GM cone or plate design.
I can't find a specific torque for the GM cone or plate design.
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