1948 Oldsmobile

Preivous cars

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Part 7

December 2014

The stance is way better with the ass down a bit.

News for today, Venetian blinds in rear window and center bullets for the 57 Cadillac hub caps.

The gear ratio in the rear axle is original 3.90:1 on cars with HydraMatic transmission and I will replace it with a 3.63:1 as I have lying around from a previous build. This will give me a little lower rpm at highway driving.

Loosen and drag out the axle shafts a bit to clear the differential carrier. Unbolt the carrier.

They have the ratio marked by numbers on the ring gear. To the left the stock carrier with a 39 divided by 10 = 3.90:1 and to the right the one I will use 40 divided by 11 = 3.63:1

I cleaned it before installation and add a new gasket. Finnaly mounted in place with new oil.

The Hydra-Matic Drive emblem looks like it should have a built in light and now it does! 

Merry Christmas and a Happy New Year


Part 6