Speedo gear
 

What is the right speedometer gear for 3.73`s, I have a 16 tooth 17 tooth & an 18, the 16 went with the 3.27`s I belive that the 18t will slow my speedo down, but will it be enuff.

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Stock 89 GT with 147000 miles,but not for long. Now with 3.73`s, soon 306 from 85 install.

21-tooth speedo gear for both AOD and 5-speed.

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351W-powered 1979 Ford Mustang notchback
Stock 5.8L under 4" cowl, C4 w/ shift kit
Holley 750 cfm, Edelbrock Performer RPM intake
1 5/8" MAC shorty headers, Al driveshaft
2.5" Off road H-pipe, 2-chamber Flowmasters
Front: 225/60/15, Rear: 255/60/15 Eagle GT II
Weld wheels (15x6;15x8), 8.8" Rear w/ 3.55s
14 x 4” K&N air filter (getting the Xtreme setup someday) http://www.mustangworks.com/msgboard/cool.gif

"Red, thou art my companion. Hasten now your quickened metamorphosis to Green that I may conquer all who dare abide there beside me. May they be left thither behind burnt black." ---Fox Body

THANKS

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Stock 89 GT with 147000 miles,but not for long. Now with 3.73`s, soon 306 from 85 install.