Rear Gear Change

apk · 09-18-2001, 05:40 PM

I recently changed the rear in my 99 Cobra from the stock 3.27 to a 3.73 ratio. How do I recalibrate the speedometer. The mechanic said the speedo uses a magnetic pickup and not a toothed gear at the transmission. Reprogram the computer???

300hp99GT · 09-19-2001, 12:55 AM

you have two choices. you either have to have a chip thats programmed for the 373 gears or you can buy a calibration box. i think thats what its called

Hammer · 09-19-2001, 01:31 AM

Call Dallas Mustang and see if they have a Speedcal to fit your Cobra.
Be sure to say whether you're using a stick or AODE. www.dallasmustang.com

------------------
Adam "Hammer" Packett:
Moderator, Gulf War Veteran

GO GET 'EM BOYS!

apk · 09-19-2001, 08:55 AM

Thanks for the tip. The speed cal box is just the thing. Sorry you told me about Dallas Mustang, could cost me a lot of money. They got some nice toys!

09-18-2001, 05:40 PM	#1
apk Registered Member Join Date: Sep 2001 Location: Baltimore MD USA Posts: 3	Rear Gear Change I recently changed the rear in my 99 Cobra from the stock 3.27 to a 3.73 ratio. How do I recalibrate the speedometer. The mechanic said the speedo uses a magnetic pickup and not a toothed gear at the transmission. Reprogram the computer???

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09-19-2001, 12:55 AM	#2
300hp99GT Registered Member Join Date: Aug 2001 Location: carrollton, ga Posts: 15	you have two choices. you either have to have a chip thats programmed for the 373 gears or you can buy a calibration box. i think thats what its called

09-19-2001, 01:31 AM	#3
Hammer AKA "Dr. Evil" Join Date: Feb 1999 Location: South Fork Ranch Posts: 1,721	Call Dallas Mustang and see if they have a Speedcal to fit your Cobra. Be sure to say whether you're using a stick or AODE. www.dallasmustang.com ------------------ Adam "Hammer" Packett: Moderator, Gulf War Veteran GO GET 'EM BOYS!

09-19-2001, 08:55 AM	#4
apk Registered Member Join Date: Sep 2001 Location: Baltimore MD USA Posts: 3	Thanks for the tip. The speed cal box is just the thing. Sorry you told me about Dallas Mustang, could cost me a lot of money. They got some nice toys!