Taller gears
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New User
Joined: Jul 2000
Posts: 1
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Taller gears
I have a 1999 F-250 Super Duty 7.3 Diesel W. 6 spd. manual trans, 3.73 gears W. Mi. per gal., Mi. to empty, and compass. I want to install taller gears, 3.54 or taller.
My question: Is there anyone I can call or does anyone out there know if these features will be affected by the installation of the taller gears, and what I would have to do to keep them working accurately. Where can I get the proper speedometer gear.
Any positive input will be greatly appreciated!
Ed
My question: Is there anyone I can call or does anyone out there know if these features will be affected by the installation of the taller gears, and what I would have to do to keep them working accurately. Where can I get the proper speedometer gear.
Any positive input will be greatly appreciated!
Ed
Posting Guru
Joined: Jun 1999
Posts: 1,172
Likes: 2
From: SW Missouri
Taller gears
I believe it is just a matter of re-programming the speedometer-no gears.
however do not count on your dealer doing it. after you change your gears it gives ford the opportunity to void your warranty, and will void your emissions certificate. dont laugh I've heard of people getting really screwed by ford over this kind of stuff.
the shop that installs the gears, will know how to re-program the speedo.
good luck
however do not count on your dealer doing it. after you change your gears it gives ford the opportunity to void your warranty, and will void your emissions certificate. dont laugh I've heard of people getting really screwed by ford over this kind of stuff.
the shop that installs the gears, will know how to re-program the speedo.
good luck
Senior User
Joined: Jun 2000
Posts: 185
Likes: 2
From: Milwauke WI
Taller gears
Two things:
You will need to get a ring gear and the 120 tooth tone wheel with it. There is a sensor in the rear differential that monitors these teeth going by it. All the rear ratios have the same number of teeth, the computer doesn't care how fast the driveshaft is turning, just how fast the rear axle is turning.
You make a programming change to the ABS module when the number of revolutions per mile for your tires change! This is done with Ford's scanner and diagnostic tool.
2000 Excursion Limited born 11/99 4x4 Toreador Red ext./gray int. 7.3PSD, 3.73LS, Skidplates, Pwr/Htd TeleMirrors, 6CDchanger, HtdBuckets, LT265/75R16D AT, Ford Wraparound deflector, PSDV8 badging, RoofMarkerLights
You will need to get a ring gear and the 120 tooth tone wheel with it. There is a sensor in the rear differential that monitors these teeth going by it. All the rear ratios have the same number of teeth, the computer doesn't care how fast the driveshaft is turning, just how fast the rear axle is turning.
You make a programming change to the ABS module when the number of revolutions per mile for your tires change! This is done with Ford's scanner and diagnostic tool.
2000 Excursion Limited born 11/99 4x4 Toreador Red ext./gray int. 7.3PSD, 3.73LS, Skidplates, Pwr/Htd TeleMirrors, 6CDchanger, HtdBuckets, LT265/75R16D AT, Ford Wraparound deflector, PSDV8 badging, RoofMarkerLights
