Which axle 3.08 or 3.42?

[willinwtx]

i run a 245/75/17 which is 31.5 tall and rarely does my truck shift out of 6th with 4-500 lbs of weight in the bed. the only time i had to use the manual buttons was with 10k worth of pipe and trailer then i had to use it to make it hold a gear or it was all over the place. you have to think of what motor is in it, these ls motors really like to rev you get the 3.08 it is going to put it down around 1400-1500 rpm cruising well out of where the motor is making power thus making it work harder or search for a different gear.