Where to buy drive/driven gears?

[93tealstang]

I'm looking to fix my speedometer the right way and wanted to change out the drive gear in the tailshaft of the transmission along with putting in a new driven gear. I have a 90 with a T-5 and 3:73's so I checked up on this and found out I'll need a 6 tooth drive gear paired with a 18 tooth driven gear. Where the best place online to get these pieces?

 

[bloopbloob]

i got mine from latemodelrestoration.com. i think like $8 for the driven gear?

 

[jrichker]

The stock range of speedo gears work correctly with a limited range of tire sizes. The 23 tooth white gear works good for some guys, but self destructs in a few months for others.

See http://www.corral.net/tech/gearcalc.html for more help

See http://www.hanlonmotorsports.com/ or http://www.ddperformance.com for parts

You must remove the tailshaft off the transmission to replace the drive gear. For most of us, that means pulling the transmission. If that idea does not appeal to you, here is a different method:
Check to see if there is a speedometer shop in your area. If there is, ask about the Stewart-Warner speedometer gearbox. I believe it is either a 777 Series Drive Joint Kits and Parts or 666 Series Drive Joint Kits and Parts. It is a small gear box that fits between the speedo pickup gear on the transmission and the speedometer. It has quick change gears that allow you to choose almost any tire size and rear end gear ratio you want. This will allow you to get the accuracy within 1%-3%. The drawback is that it isn't cheap.
Please excuse the typo (their's, not mine) in the following picture - it should read Custom ratio adapters, not Custom radio adapters.

See http://www.gaugeguys.com/ratioadapt.htm for more info.