If you run it in gear with the wheels on the ground, the truck doesn't move but the speedometer registers, something behind the transmission is broken. If it doesn't register, something is broken ahead of the output shaft of the transmission. Your speedometer runs off a gear at the rear of the transmission output shaft.

Why was he double clutching?

Last edited by truckernix; 03/29/2016 12:36 AM.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!