To the 3/4 ton guys:
I was of the understanding that I can swap the pumpkin out of my
1953 Chverolet 3/4 ton truck which has a stock rear end and a 4.57 gear
ratio with one from a 67-72 Chevrolet/GMC 3/4 ton which has a 4.11 gear
ratio. I was of the understanding that all 3/4 rear end were the same from
1947 to 1972 except that the best ratios were in the 67-72 trucks.
But, as I have been shoping around I get a response like this one
below! Are these guys right, what book are they looking at? I talked with
Jim Carter's and they say a 67-72 c20/c30 pumpkin is what I want to improve my highway speeds. I am
inclined to trust Jim Carter but I am hopeful for more definitive
advice from others who might have already done this.
Dear Sir,
Two things: one, we cannot help you with your request for a higher gear
ratio as all we have left at present is lower ones. Two, our books say that
you have to stick to Chev or Gmc 20 or 30 series in 1961-4, or in 1965-6 the
20 series 3/4 ton with coil springs to find the 4.10 ratio. The 67-72
pumpkins do not work and the highest gear ratio you can get in the ones that
do work is 4:11. The others available are 4.57, 5.14 and 5.83. Good luck,
Elfros Autowreckers
Thanks,
Dennis Oland
1953 Chevrolet 3/4 ton
