I have to take a new car home and I want to recalibrate the speedo before driving it for 6 hours on the highway. Does anyone know what P/N's I need for speedo gears for a TH350 with a 3.73 rear and 26.1" tires?

[This message has been edited by Apeiron (edited October 14, 2001).]

 

Not sure about the p/n's, but according to the calculator on www.tciauto.com , you should use a pink 7-tooth drive gear and blue 20-tooth driven gear.

Dealer should be able to look them up based on that.

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57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

Thanks, I'm back home and already ordered the gears though.

Is there a 7 tooth drive gear for the TH350? I thought there were just 8, 9 and 10.

 

Just going by what the TCI site said. An 8/23 combo would work, but they didn't list a 23-tooth driven gear.

 

Yeah, there's a 23 tooth gear but it's reverse-drive for the Corvette. :P