5speed GT

what tooth speedo gear do i need with 3.73 gears? I have found alot of charts and they all stop at 3.55s for my 91

thanks

ROTTITANK

http://www.latemodelrestoration.com/...gory=MSPEEDCOR

Blckstng93

Ill make it easier.

83-89 7 tooth gear drive 5spd & auto:
3.73 = 21 tooth

90-98 8 tooth gear drive 5spd & auto:
3.73 = 23 tooth

Stanpower

http://search.stores.ebay.com/CJ-Pon...369020QQsofpZ0

5speed GT

so a 23 tooth does 3.55, 3.73 and 4.10?

gspfunk

If you change out the drive gear on your output shaft to a 6 or 7 tooth (assuming it's not already), you can run steeper gears and still have an accurate speedo.

88BlueGT

Yea, Im pretty sure the speedo is the same for 3.55's - 4.10's. Im using the 23 tooth for my 3.90's.

7upedition

23 tooth is as close as you'll get, any more teeth and the gears wont mesh and it'd be chewed up in no time....

gspfunk

My 23 tooth got chewed up.....That's why I was saying you can get better accuracy w/ the 6 or 7 tooth drive gear and then match up the correct speedo-driven gear. My Zspec has the 7 tooth yellow drive gear and I'm using the black (20 or 21 tooth?) driven gear for my 3.55's.....

7upedition

^I agree with you, but not sure if he is willing to change the drive gear to mesh a 21 tooth black... But yes youare correct, that is the correct way to do it.