Quote:
Originally Posted by jocko
29" tire, TH400, and 2600 rpm @ 50 mph = 4.57 gear.
Are you using your speedometer or a GPS for the speed you think you're at? (use a GPS).
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Jocko,
I really like this chart you posted. It is very nice. Is this something you created, or is it from a website?
I'm trying to decide between changing out my transmission or my rear end gears. Are you willing to show another table based on my truck's configuration? I'm hoping you will.
- T350 or TH350 transmission. (Are these the same thing? If not, all I know is that mine is stock from a 1971 truck, and it has the rectangular pan with 45 degree notch in the rear passenger corner of the pan.)
- 4:10 rear end gear.
- 285/75/16 tires = approximately 33" diameter.
I'm thinking about a new positraction rear end with 3:52 gears. I'm very interested in how this would affect the engine rpms at highway speeds.
Thanks, JP