3.73 gear install?

izze01 · June 25th, 2007, 06:28 PM

I just replaced my stock 2.73's with the ford 3.73's and I was wondering what the part looks like that fixes my speedometer. If anyone has pictures or knows how many teeth are on it please let me know. Thanks

HMUSN · June 25th, 2007, 06:33 PM

I believe you need an 18 tooth one.

http://www.fordracingparts.com/download/charts/129.pdf

TENGRAM · June 25th, 2007, 10:25 PM

Originally Posted by izze01

I just replaced my stock 2.73's with the ford 3.73's and I was wondering what the part looks like that fixes my speedometer. If anyone has pictures or knows how many teeth are on it please let me know. Thanks

what year is your mustang? 83-89 you need a 21 tooth...

izze01 · June 25th, 2007, 11:33 PM

I have a 94 mustang gt.

TENGRAM · June 26th, 2007, 12:29 AM

Originally Posted by izze01

I have a 94 mustang gt.

the 23 tooth will get you close enough. to get it perfect you would need to also change the tranny drive gear to a 7 tooth. i believe the drive gear would be located in the tail section of the tranny but you should find a diagram to be sure.

izze01 · June 26th, 2007, 08:13 AM

Thanks man. How close are we talking with just installing the the 23 tooth gear?

neverfastenough1 · June 26th, 2007, 08:16 AM

It will be real close but off a couple mph and also the 23 tooth gear if you research it has a problem with stripping because the teeth are too small. They are only expected to last around 25,000 miles.

neverfastenough1 · June 26th, 2007, 08:29 AM

Originally Posted by TENGRAM

Originally Posted by izze01

I have a 94 mustang gt.

the 23 tooth will get you close enough. to get it perfect you would need to also change the tranny drive gear to a 7 tooth. i believe the drive gear would be located in the tail section of the tranny but you should find a diagram to be sure.

+1 the drive gear is located right where the speedometer cable goes into the tranny. If you are going to take it apart I would suggest going one better than the 7 tooth and get a 6 tooth.

http://www.mustang-tech.org/wiki/94-...eedometerGears

izze01 · June 26th, 2007, 07:24 PM

I have 17 inch rims with 245/45's and stock teeth for 2.73 gears. Which tranny drive gear is usually in the tranny the yellow or the green. Should I get a 18 or 21 tooth driven gear to be the closest.

Drick · June 26th, 2007, 07:29 PM

23 tooth gears are junk they strip fast mine had one in it when I bought it and there wasnt a tooh left on it

izze01 · June 26th, 2007, 08:36 PM

so what is everyones idea of what i should do. I don't feel like taking apart the tranny I don't really have alot of time to do anything right now. Any suggestions.

TENGRAM · June 26th, 2007, 09:35 PM

Originally Posted by izze01

so what is everyones idea of what i should do. I don't feel like taking apart the tranny I don't really have alot of time to do anything right now. Any suggestions.

i would just get the 23 tooth and see how it does. if it does strip after awhile then switch down to a 21 tooth.

Tony_90fox · June 26th, 2007, 11:03 PM

Originally Posted by neverfastenough1

It will be real close but off a couple mph and also the 23 tooth gear if you research it has a problem with stripping because the teeth are too small. They are only expected to last around 25,000 miles.

+1, i talked with the guy who did my gears and that is what he does on the side and knows his stuff...Get the 21 tooth gear, and no more teeth because they are thin and tend to chip and break.

June 25th, 2007, 06:28 PM	#1
izze01 Regular 1994, mustang gt N/A Join Date: Dec 2006 Location: Clarksville Posts: 292 iTrader: 0 reviews	3.73 gear install? I just replaced my stock 2.73's with the ford 3.73's and I was wondering what the part looks like that fixes my speedometer. If anyone has pictures or knows how many teeth are on it please let me know. Thanks

June 25th, 2007, 06:33 PM	#2
HMUSN Doc 1986 SVO Join Date: Nov 2006 Posts: 36,836 iTrader: 9 reviews	I believe you need an 18 tooth one. http://www.fordracingparts.com/download/charts/129.pdf __________________

June 26th, 2007, 08:16 AM	#7
neverfastenough1 Hardcore Enthusiast 2002 Mustang GT Join Date: May 2007 Location: Savannah, Ga Posts: 2,777 iTrader: 3 reviews	It will be real close but off a couple mph and also the 23 tooth gear if you research it has a problem with stripping because the teeth are too small. They are only expected to last around 25,000 miles. __________________

June 26th, 2007, 07:29 PM	#10
Drick Big timin' in a small town 2004 FX4 F150, 86 GT Join Date: Apr 2007 Location: Gods country. Nordern Michigan eh Posts: 14,365 iTrader: 1 reviews	23 tooth gears are junk they strip fast mine had one in it when I bought it and there wasnt a tooh left on it __________________ FX4 Crew Crew member #1 Don't take anything I say to heart, I don't try to come off as an asshole. It just happens

LinkBacks (?) LinkBack to this Thread: http://www.moddedmustangs.com/forums/5-0-mustangs/26367-3-73-gear-install.html
Posted By	For	Type	Date
Speedometer/Gears Question - BuckeyeStangs Message Forums	This thread	Refback	March 16th, 2009 05:05 PM

June 25th, 2007, 11:33 PM	#4
izze01 Regular 1994, mustang gt N/A Join Date: Dec 2006 Location: Clarksville Posts: 292 iTrader: 0 reviews	I have a 94 mustang gt.

June 26th, 2007, 08:13 AM	#6
izze01 Regular 1994, mustang gt N/A Join Date: Dec 2006 Location: Clarksville Posts: 292 iTrader: 0 reviews	Thanks man. How close are we talking with just installing the the 23 tooth gear?

June 26th, 2007, 07:24 PM	#9
izze01 Regular 1994, mustang gt N/A Join Date: Dec 2006 Location: Clarksville Posts: 292 iTrader: 0 reviews	I have 17 inch rims with 245/45's and stock teeth for 2.73 gears. Which tranny drive gear is usually in the tranny the yellow or the green. Should I get a 18 or 21 tooth driven gear to be the closest.

June 26th, 2007, 08:36 PM	#11
izze01 Regular 1994, mustang gt N/A Join Date: Dec 2006 Location: Clarksville Posts: 292 iTrader: 0 reviews	so what is everyones idea of what i should do. I don't feel like taking apart the tranny I don't really have alot of time to do anything right now. Any suggestions.

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3.73 gear install?

3.73 gear install?

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