|
Re: '58 GMC Model 150 Info
It is a SM420 4-speed with gear ratios of 1st: 7.05, 2nd: 3.58, 3rd: 1.71, 4th: 1, Reverse:7.05. It has a differential ratio of 4.56, I need to change the ring and pinion gears so that I can drive at 65 - 70 and get decen mpg. I know that it has to be abou 3.11 or something close to that. how can I find out what kind of ring and pinion gears I would need to get
|