Thanks again guys, I measured the distance between mile markers vs recorded milage calculated the percentage differance and bought an adapter from the company mentioned above. If that don't fix it I will look at gps speedometers. I'm not confident in my abilities to change out drive gears in the tranny output driver.

Thanks all,

jim

Last edited by jcburn; 11/07/2013 2:20 AM. Reason: left out data