Speedo Gears for 3.73??

89GTimporteater · 04-01-2003, 03:11 PM

Well, my 3.73 31 spline 9" rear end is awesome. Pushing 2nd and 3rd from 1500RPM's leaves nice dual black marks. The problem is my speedo gears. Does anyone know the color code/teeth combination for 3.73's??? I hate doing 80 and reading 105.

BLACK85GT · 04-01-2003, 03:24 PM

just tell the dealer its for 3.73 and they will know the correct one.

93 Cobra needs input · 04-01-2003, 08:11 PM

I believe that the BBK web site has a chart and the options available. [URL=www.brothersperformance.com]

SilverSN95 · 04-02-2003, 05:15 PM

I remember that chart when I changed my speedo gear for the 3.55 rear end I installed. I remember that the gear was white in color and had 23 teeth I believe. This chart showed the same gear for the 3.55 and 3.73 rear end. I had to go to a speed shop to get the gear since the dealer doesn't carry the 23 tooth speedo gear. I think to get the correct speed reading with anything shorter than a 3.55 required the internal speedo gear in the tranny to be changed as well.

squid · 04-05-2003, 10:25 AM

I put the white gear in mine after my 3.73 swap as recommended and my speedo is 7 mph fast. It says 75 and Im really doing 68.

04-01-2003, 03:11 PM	#1
89GTimporteater Registered Member Join Date: Mar 2003 Location: Rolla, MO Posts: 15	Speedo Gears for 3.73?? Well, my 3.73 31 spline 9" rear end is awesome. Pushing 2nd and 3rd from 1500RPM's leaves nice dual black marks. The problem is my speedo gears. Does anyone know the color code/teeth combination for 3.73's??? I hate doing 80 and reading 105.

04-01-2003, 03:24 PM	#2
BLACK85GT Registered Member Join Date: May 2002 Location: Tampa,FLORIDA Posts: 340	just tell the dealer its for 3.73 and they will know the correct one. __________________ 5.0, Holley heads, 1.7 Scorp Rockers, Stealth intake, Holley 600 carb, Holley Mech. Fuel pump, MSD 6Digital, MSD distributor, Hotchkis upper/lower rear control arms, FMS B Springs, 3:73 (8.8) rear. Production # 9,377

04-01-2003, 08:11 PM	#3
93 Cobra needs input Registered Member Join Date: Oct 2001 Location: Madelia,MN USA Posts: 58	I believe that the BBK web site has a chart and the options available. [URL=www.brothersperformance.com] __________________ 331 stroker, JE 8.5:1 pistons, H-beam rods, steel crank, main cap, msd with 3step, BBK ceramic long tubes,TKO, 4.30's, motorsport Z303, Victor Jr aluminum heads, crane gold 1.6, southside lift bars, 90/10 front, 50/50 rear, centerforce dual friction clutch, Vortech S-trim soon.

04-02-2003, 05:15 PM	#4
SilverSN95 Registered Member Join Date: May 2002 Location: Ontario Posts: 39	I remember that chart when I changed my speedo gear for the 3.55 rear end I installed. I remember that the gear was white in color and had 23 teeth I believe. This chart showed the same gear for the 3.55 and 3.73 rear end. I had to go to a speed shop to get the gear since the dealer doesn't carry the 23 tooth speedo gear. I think to get the correct speed reading with anything shorter than a 3.55 required the internal speedo gear in the tranny to be changed as well. __________________ Al, 94 Mustang GT 3.55 gears Magnapack mufflers with 2.5" tails STEEDA TRI-AX Shifter MAC pulleys

04-05-2003, 10:25 AM	#5
squid Registered Member Join Date: Sep 2002 Location: Dayton, OHIO Posts: 73	I put the white gear in mine after my 3.73 swap as recommended and my speedo is 7 mph fast. It says 75 and Im really doing 68. __________________ 93'GT 5spd. Underdrives, FMS clutch, adjustable quadrant,Flowmasters, Kenny Brown subframe connectors, 3.73 gears, Steeda Tri-Ax. JBA shorties, BBK h-pipe. More to come.

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