How to fix a speedo?

[five&dime]

Here is a diagram. Part's number 40-44 are the whole speedo gear assembly. From what understand. The last stock speedo gears were just sold last month. Check with Riley at Lynchburg Nissan b/c I think he had the last ones.

http://www.carpartsmanual.com/datsun510 ... fault.aspx

[datzenmike]

Remove small 10mm? bolt (47) and remove lock plate or key (45) and pull out with very slight twisting motion.

[jonmorine]

Wow that is exactly what I wanted to hear. I wondered what that bolt was for. I now have to source the parts. I sent an email to Riley so hopefully I can get the part.

If anyone else knows of where to find one let me know.

Thanks everyone.

[okayfine]

If anyone else knows of where to find one let me know.

Think of all those tossed 4-speeds...

That said, the mechanical speedo sender assembly might be the same for a large portion of the '70s Datsuns. My local junkyards have left the '70s behind, but you might have more luck in your neck of the woods, provided Riley can't supply you a new piece.

Still, it would be interesting to pull what you have and see if you can figure out why it's broken. Might be a simple fix to the removed part. If the assembly turns properly and rotates the square hole for the cable, you might have something wrong inside the transmission. Unlikely, but still...