Hi I was driving my olds and the speedo was working fine I cranked it up a bit after that the thing sat on 30 it started going back down slow and if I went over 30 it moved up not correct speed The od still works any I clue want got on
Thanks Steve

 

If it's the original driven gear in the tranny, the teeth may be wearing down and not engaging the drive gear properly any more.

 

It's been changed maybe I need another one so I guess I have to find. Out what gear is in there I never changed one but the plate on the M21 holds it right. Then take it out replace and lube what should I use for lube
I should be able to look at the gear teeth
Steve

 

I took the gear out and it looks like new, The cable spins it must be in the head
Speedo any Ideas Also to they make a special gasket or o ring on that housing that goes in the tranny ,So it won't leak .
Thanks
Steve

 

Even though the cable may spin it may be broken inside the sleeve, see if it pulls out. You can hook a drill motor to it and see if the speedo changes.

 

Eric I took it out a again and put a drill on it it moved now what the speedometer head?
Steve

 

My guess is that your speedo indicator is dragging, why do I think that? Well if you odometer still works, you said it still does work, that will rule out a bad cable or drive.
There is no mechanical connection from the cable to the speed indicator in the head so it can be stuck in any position even though the cable is turning. The very light spring tension is what makes it come back down slowly even though it's dragging. Take it apart and see if it's free or not....

 

Does it work? If it did not then its back to the speedometer itself.

 

No something dragging on the pointer has anyone ever take the speedometer out I never did one on a olds and way of getting to the thing from taking the lenses off,
Any help is welcomed
Thanks Steve