I can get any of the 3 ratios I mentioned. 5H is my 1:1 ratio so no OD. I have a 17221 (10 spline axles) rear end with air brakes and a spicer 5756-B transmission. Temperance, Michigan (I fixed it). Mostly flat lands within a few hours every direction of me with the exception of some long hills here and there but by no means mountains. The ratios are already figured in 5H in the second picture at the bottom of each of the 4 pieces of paper per gear set one is at 65mph the other is at 70 mph.

Last edited by Pvmt-Pndr; 06/13/2019 12:10 AM.