I just swapped the 5.13 in my one ton with a 4.56..makes about 10 mph difference.. i wouldnt want to go any higher than that tho..cuz i doubt the 235 would pull that one ton up hills or against wind goin too fast... the 4.56 is about all i want.. i can still do 55 without over rappin and still take some fairly decent hills. i havent had a 3 ton load of gravel on it yet with that in to know how it pulls....
