So my Odometer just quit working, speedo works ( most of the time). The truck only has 98k original miles on it so I really wanna keep up with everything!

is my odometer electrical or mechanical and what might be the culprit?

Its an early 91, non intercooled 727 auto

 

Look in the sticky there is a plastic gear in the odometer that breaks.

 

Ok so I have replaced the gears and and made sure they went in right and still not working. Any more ideas?

 

]Take it back apart and pull the armature of the odo motor out (just pulls out) and you will find it wet with petroleum jelly that the new .gears no longer need. Wipe every thing down clean . Make sure no broken teeth remain from the gears that fail. Take time and understand how they all mesh together and reassemble. Its tedious Mine took three tries to get right. Now works like a charm

 

Ok so I have cleaned and reassembled multiple times and still nothing. Im gettin lost now

 

Check where the vehicle speed sensor mounts on the transfer case and make sure it's tight and not loose or flopping around.

 

Its good and tight