Quote:
Originally Posted by bennelson
When I talked to Master RV Mechanic Rich last night, he said that the hardest thing might be to get the speedometer to read right. Of course he's had years of working on diesels, and I can barely tell a fuel injector from a hole in the wall....
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Speedometer Gear, Speedometer Gears, Ford, GM, Dodge 700R4
This site has a lot of good pics of what I used to work with. The "drive gear" is the one that is on the transmission's output shaft - the part the driveshaft slides on to.
The "driven gear" is the one that spins the speedo cable. There will be a range of a half-dozen driven gears that will match any certain drive gear. That is the easiest way to adjust a speedometer. Otherwise, you might have to pull off the tailshaft of the tranny and change the drive gear. Not a biggie, but sure can be messy...
There's adapters down on the page, for changing types of cables, but a person might get inventive with a gear-reduction of their own.
If nothing else, this'll help you to understand just what is going on speedo cable-wise...
