How many teeth on the speedo gear? - NJFBOA - Home of New Jersey's Camaros and Firebirds

Gio93z · 05-05-2010, 10:21 PM

...at approx. 55mph, my speedometer is reading about 65 mph...as of right now, the speedo gear is stock in my 93 camaro w/ 4L60......

am I going more teeth? less teeth? or if there is a particular number of teeth I should try first....?

went from 2:73 to 3:73 rear end gearing.......stock 16" rims to 275/40/18 if that matters

so I found a computation sheet - looks like i need to know how many teeth are on my drive gear which should be 17 and my rear tire diameter...the only thing i cant find is my rev/mile .... anyone know that?

thanks

Pampered-Z · 05-06-2010, 10:33 AM

Looks like you need the following for 3:73s

GM Part# 25513052 - Is for the 44 tooth driven gear
GM Part# 8642620 - Is for the 15 tooth drive gear

Link below has good info:

http://www.transmissioncenter.net/sp...n_______va.htm

Gio93z · 05-06-2010, 09:18 PM

i just had the trans done 6 k miles ago - i didnt think of it at the time.....

thats a good link though - thanks

Gio93z · 05-07-2010, 08:59 PM

right now i should have a 37 teeth on the driven gear and 17 teeth on the drive gear....so if i need to SLOW DOWN my speedometer does that mean I should go with MORE or LESS teeth on the driven gear?....supposedly I should aim for a 39 or 40 tooth driven gear.....

??

jts98z28 · 05-09-2010, 12:08 AM

cant you just get a tune to fix that?

Featherburner · 05-09-2010, 11:18 AM

Quote:

Originally Posted by jts98z28

cant you just get a tune to fix that?

Not on a 93.

Gio93z · 05-09-2010, 12:10 PM

correct..i cannot tune to fix that