mark79,80

Transmission fluid is leaking where the speedometer cable screws into the speedometer gear housing on a 1979. What parts need to be replaced?

tonak

It's been a few years but I replaced the "bullet" and the driven gear to stop a similar leak. Dealer had the parts and not expensive.

thegazman

The sleeve for the speedometer driven gear has an "O" oil seal around it. I purchased a new sleeve and "O" ring from ZIP for $14.50.

doorgunner

Around the outside edge of the housing is a large o-ring........also.......there is a small seal held in place by a C-clip in the center hole of the housing that the speedometer gear-shaft slides into.....

If the speedometer gear-shaft is damaged/scratched where the small o-ring seals around it, you may need to replace it because it will make the new small lo-ring start to wear and leak.