Thread: BOP 8.2 options
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Old 08-23-2023, 12:29 PM
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68 Firebird 68 Firebird is offline
Chief Ponti-yacker
 
Join Date: Apr 2001
Location: Colonia NJ USA
Posts: 961
Default Auburn with 3:08

My car had 70,000 with original 3:08’s. But pinion bearing was noisy.
Installed new Auburn posi while reusing original gear set.
Set pinion bearing depth using same shims. Crush washer was a royal
PITA. Set backlash same as recorded before disassembly.
Pattern verified before and after. Rear is perfectly quiet.
Could not be happier. Also had new bearing out on axles shafts as well.
That was some 12 years ago!

Gerry.

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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds
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