Special Service Mustang.net Forums - 3.73 speedometer gear

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- - 3.73 speedometer gear (http://www.specialservicemustang.net/forums/showthread.php?t=1868)

CNTLOSE

08-16-2009 04:12 PM

Quote:

Red gear (manual trans) is 21T. If that was very close to accurate with 4.10 and an 8T AOD (late '89-'93), the tires must have been huge....enough to bring the final drive ratio way back down.

I was running 17x9 Cobra wheels and it was within a few mph...verified by radar.

FoxChassis

08-16-2009 05:16 PM

Factory tires were just under 26" tall.

To be within a few mph with an 8T speedometer drive gear on the output shaft of an AOD, a 4.10 rear gearset, and a 21T speedometer driven gear, the tires would have to have been around 30" tall.

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