Speedometer cable and gear reduction adapter

[Hey Jerry]

Hi, where is the best place to purchase a Boss speedometer cable? Has anyone replaced their gear reduction adapter?

 

[c9zx]

I would contact these people. https://transmissioncenter.net/product-tag/speedometer-gears/
They can also make custom gear reducers. The OEM reducer, if one can be found, sell for insane money.
I think the original reduction rate is about .69 but double check that. Let us know what you end up doing. Chuck
I think the OEM PN was C9ZZ-17294-A or C8ZF-17294-B.

 

[Hey Jerry]

Thanks Chuck. I believe the ratio is .075. However, I am not sure if a direct or reverse rotation

 

[c9zx]

The reducer doesn't care. The L or R pitch on the driven gear is what matter. NPD has a chart for driven gears. I hope you find something that works for you. Chuck

 

[rvrtrash]

The ratio is .75. I need one for my car also.

 

[Hemikiller]

The speedometer cable used on all 71/72 4 speed cars with the reducer is D1ZZ-17260-F. It's 71 13/16" long. Not currently available in reproduction that I'm aware of.

https://speedometercablesusa.com/cables_and_housing_assembly.html