Speedometer gear

[Clark]

The gear in the transmission has been stripped on my 66 series V. I can rotate the rear wheels and feel a rubbing on the drive gear which is in good shape. Looking at all the diagrams I can't tell if this internal gear is part of the shaft or is separate from it. Repair procedure anyone? Can this be accessed without pulling the whole transmission?

 

[RootesRacer]

The gear in the transmission has been stripped on my 66 series V. I can rotate the rear wheels and feel a rubbing on the drive gear which is in good shape. Looking at all the diagrams I can't tell if this internal gear is part of the shaft or is separate from it. Repair procedure anyone? Can this be accessed without pulling the whole transmission?

I think it can be removed fairly easily but absolute worst case you just remove the tail housing.

 

[s2willdo]

I replaced mine recently when I rebuilt my transmission. As I recall there are c-clips that hold the speedometer drive gear in place. You just slide it off the output shaft.

Rick sells the plastic driven gear but it doesn’t come with the metal ring that is between the plastic and the output shaft.

I had a machinist swap the metal piece from my old one.

I may have goofed up though because my Speedometer isn’t working. It’s one of two things. First it could be spinning on the shaft because he may not have epoxied it well enough on the metal ring or second my driven gear could be mismatched since I swapped transmissions from a later model into my S2. I haven’t tried to fix it yet because I’m thinking the entire transmission has to come out.

I’m interested in hearing how this turns out for you.

 

[junkman]

You need to match the color of the drive gear on the output shaft.to the gear that is striped or broken. To do so you'll need to take out the driveshaft and then remove the tail shaft housing to access the gear.

 

[alpine_64]

You need to match the color of the drive gear on the output shaft.to the gear that is striped or broken. To do so you'll need to take out the driveshaft and then remove the tail shaft housing to access the gear.

In general i agree.... But that assumes the rear axle hasnt been chnaged.

Likely the car would have had a 4.22 originally ... But maybe someone has put the earlier 3.89 in.. So worth checking the actual diff ratio as the speedo would likely be the original drive gear... But rear end may not be... So might be a chance to correct any speedo error.

 

[beamdream]

Speedo (part no.) versus diff ratio is in tech data somewhere on site.