Gear Vendors overdrive speedometer gear

[Enforced_Leo44]

Hi everyone,

My CUCV has a GV Overdrive unit installed, it has been by a previous owner, dating back probably 15 years at the least.

It works great and it really gives some relief to the engine at highway speeds.

Now, the problem I have is that the speedometer reads about 15% less than the real speed, say like when doing REAL 45mph, the speedo shows 40mph. Conclusion: either I recalibrate the speedometer (no thanks) or I get a new speedometer gear (yes please).

Does anybody know what kind of speedometer driven gear I need to get? Is it a proprietary design or is it something more "universal" like a TH400 gear?

Thanks in advance!
Leo

 

[chevymike]

I don't think it proprietary but I bought mine from GV as I also had to buy the NP208 adapter (mine was used with a 205 adapter). When I put it in, it seemed like it was a standard GM style.

 

[Enforced_Leo44]

I don't think it proprietary but I bought mine from GV as I also had to buy the NP208 adapter (mine was used with a 205 adapter). When I put it in, it seemed like it was a standard GM style.

I'll take off the speedo gear assembly on mine and check, thanks for the heads up!