Ok here is my problem. I have a 2000 F-150. I put 33/12.5/17 tires on my stock 17 rims. I changed my gears from 3.55 to 4.10. My speedo now reads approx 7mph faster then I am realy going. I do not have a speedo gear in my trans. I have to have it done by the computer. Does anyone know if Ford will do this? I have heard story's that say they will do if for a tire change but not for a tire and gear change. That will su*k big time! This also means that I am putting more miles on my truck. Has anyone come across this problem before. And can I get it fixed? Thanks in advance.

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2000 F-150 sport 4.2 v6 auto transmission
Jacobs Ignition
K&N
Superchip
Throttle body spacer
cat back exaust
Custom Seat Covers
Dash Mat
Ford Floor Mats
Cd player
pioneer Speakers
Rockford Amp
Truck Box
Rhino Liner
Grill Gaurd
Nerf Bars
custom graphics
tail light covers
Vent Visors
Driving Lights
tinted windows
Fabtech spindle lift
3 inch body lift
lift lips
33/12.5/17 Procomp A/T
4.10 gears(had 3.55)

 

Since you have a Superchip installed, reprogramming the Truck computer will be futile. The chip takes over for the internal ROM. You may want to talk to Mike T. on the computer forum to see what he can do for you.

Fritz

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2000 F150 XLT 4x2 ExtCab Styleside 4.6l Auto in Island Blue.
Dark Graphite interior, White face gages, Superchip, K&N air filter,
Airbox Mod, Front window tint, PowerAid, Flowmaster 50 SUV,
LeBra soft tonneau, LineX Bedliner, Ford Bugshield, B-Quiet Sound Shield,
2 in lowering shackles, Hellwig Swaybar, Monroe Reflex Shocks,
100w Head and Fog lights, Clifford Alarm, Blaupunkt CD,
JBL comp speakers, Punch subwoofers, Escort 8500 Radar Detector,
ECM Jammer Pod, some nice floormats and lots of payments.