which speedo gear for tko600 and 4.10s?

[jakesspv6]

Before I buy the one I think is what I need I wanted to ask if the 7 tooth white 23 speedo gear is the one I need? I have a tko 600 in the car along with 4.10s and will be installing some falkin 315/30/18s on the car.

Speedometer Recalibration Gears for 1979 thru 1998 Ford Mustang

any input would be appreciated.

Thanks
-Jake

 

[mwolson]

The 23 tooth gear is the the one you may want, but I hear they get chewed up and fail very quickly. I'd recommend a Speedcal instead.

The guy in this thread has one he can't use: http://www.svtperformance.com/forums/sn95-cobras-24/927040-need-speedcal-help.html