A worn vehicle speed sensor driven gear can cause the speedometer not to work. Replacing the worn out speed sensor should correct this concern.
Average mileage: 145,400 (19,800–250,000)
Drive Train affected: 4WD
11 people reported this problem
The bearing for the nylon gear seized, causing the steel worm gear in the transmission to rub the nylon teeth off. It is an easy part to reach and replace, with minimal tools and experience. Hope this helps someone out there.
Issue occurred when I was driving. The mechanic who worked on my vehicle said the unit looked like it had just exploded. It was a couple years ago now, so I'm struggling to remember what parts he did replace. He couldn't make the speedometer work still though, said that it was something with the speedometer and that by law I had to take it to an authorized speedometer testing shop. I never heard that one before, but I've been driving with an intermittently working speedometer for about 5 years now. It seems to work more often when it's cold out. I live in the Denver, CO area. In the summer my speedometer never works, but some days in the winter it does.
My Speedometer stopped working at the same time as my Tackometer. The Tack sits at 0, the speed jumps to about 20 mph as soon as the car is started, and fluctuates between about 20 and 40 mph not based on actual speed being driven. My mechanic doesn't know what to do with it. Any ideas? I'm buying a GPS for a short term solution, but need a fix eventually...