Thread: 12 Bolt GM ?
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Old 12-25-2010, 12:57 AM   #8
FED 387
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Default Re: 12 Bolt GM ?

larry the code ya gave me is what was in that rear originally when installed in the car
BT---3:55 posi
01---January
22---22nd day of the month
G----Detroit Gear & Axle
2----Night shift
E----Eaton Positraction Differential

Housing dimensions are
Center to center of the spring perches----42 3/4 inches
Inside of backing plate to inside of backing plate---53 1/4 inches
Outside of brake drum to outside of brake drum---60 1/4 inches
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