Quote:
Originally Posted by mongocanfly
if you have military axles, they should be 4.56s
using a rpm calc
a 255/85-16 is just over 33in tall
your od will be .7
at 65mph rpm should be 2113 with 4.56s
very close to what my C30 turns with 4.10s and a shorter tire
http://www.csgnetwork.com/multirpmcalc.html
but i think with 4.10s or 3.73s you should be ok as well |
It is a 78 K30 crew cab, not the military variety. Still surprised that low of gears in a civilian truck, but I guess that is what the Original owner wanted. I think I will re-gear it to 3.73. Now, just to figure out what brand of gears to go with, seems to be quite of a variety.