1994-1997 dodge 2wd NV4500. 5 speed with granny low and OD. 5.61:1 granny, 0.73:1 OD. This transmission is easily adaptable to work with the stock clutch linkage and a mechanical speedometer, and is strong enough to take anything you can throw at it. 5th gear would affectively give you a final drive of 3.34:1 instead of 4.57:1. I am not sure of what size tires you are running, but if they are about 31 inches in diameter, RPM at 70mph would be about 2530 rpm