1933

[gregcrosby]

Getting my 1933 out and running again need all tech info I can get. Especially need rear universal joint assemble, would like to learn how to change rear differential ratio and am interested in anything for 1933. New member. Thanks for help

[Larry]

You will have to do some checking into ratios of the following, but we can open up your search window a bit with the following information. According to the Hollander Interchange manual covering your 1933 Pontiac, the following cars have differential cases and related parts (not axle shafts or housings) which will interchange with yours:'33-'36 Chevrolet Master and commercial; '37-'39 Chevrolet 1/2 ton; '38-'39 Chevrolet 1 ton; '36-'40 GMC 1/2 and 3/4 ton; and '33- '36 Pontiacs, all models. As with all interchange information, double check it carefully, especially if you can do a visual inspection.
The truck gears will probably still be pretty low (I am assuming you wish a higher ratio for better road speed), but perhaps the other later Pontiac years will hold some promise. I know my 1940 has what they referred to as "Mountain" ratio (figures since it was raised in the hills of Kentucky) of 4.55:1, but there was also the "Standard" ratio of 4.3:1 and the "Plains" ratio of 4.1:1.
Hope this helps.