Quote:
Originally Posted by Kranky
The transmission yoke that the mechanic speaks of is the part that attaches the universal joint (at the front of the driveshaft) to the transmission output shaft.
|
Thanks. I understand better the workings of a speedometer now. I've been doing research on Internet and compiled a short "cheat sheet" that I"m going to give to the mechanic tomorrow. Here's what I have so far:
"DEAD SPEEDOMETER & ODOMETER
Possible causes:
- wiring connectors, incl. those on the firewall (loose? corroded?)
- bad ground
- speed sensor and/or sensor plug
- transmission yoke and rear tranny cover
- ECM chassis harness
- frayed wiring/shorts somewhere between the VCC and ECM
- loose fuses/moisture in the fuse box
NOTE:
1) The tranny had some work done on it in January 2009 and was taken out and then put back in.
2) The windshield was replaced in July 2009.
3) I sprayed all wires/connectors with the Termin8or after the speedo died the first time about a month ago."
If anyone can think of any more causes, please let me know - I'll add them to the list for the benefit of the International Trucks mechanic. Thx!