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3:73 without overdrive,4:10 with overdrive

From: Daven Anderson
Date: January 27, 2001


The ratios above were installed on all 6 cylinder 1956 Plymouths at the factory,unless the buyer special ordered a different ratio. I have seen a few cars where the dealer had installed different ratios as well per customer request (example- my '60 Ply. wagon).

A swap to a later ('65-73) B-body rearend would be a really good idea. The tapered axle shafts in the orig. axle are weaker than the straight shafts of '65-up AND complicate brake servicing. You'd also get built-in service parking brakes and the brake drums are available from regular suppliers as well.


Last changed: July 19, 2018