Gen 3 Speedo Gear help

[red97XJ]

Hey guys, on a Gen 3 is there a different speedo gear that can be put on at the transmission? Bigger tires are making the speedo off and I want a way to correct it cheaply. If so, is there a chart somewhere that tells me what I need to order from FMS?

Thanks,
Jason

 

[aldive]

There should be no gears; its computer controlled.

 

[red97XJ]

anyway to adjust the computer to read correct speed and mileage?

Thanks,
Jason

 

[Jefe]

If its less than 10% off, you can have Ford reprogram the computer. Or you can get a chip that adjusts for the new tires. Or you can install a Superlift Tru-Speed, and adjust it yourself.

 

[red97XJ]

It is still under warranty, do you think Ford will adjust for free or will they charge? If they charge, how much should it be?


How much is a super lift tru speed?

Thanks guys,
Jason