Speed sensor and fuel mileage

[scagle1]

Hello all, well got the truck up in the air and some 37" shoes on her and am wondering can the dealership recalibrate the speedometer or do i need a product like the truspeed? Will recalibrating via computer affect my shiftpoints at all? plan on ordering Dp-tuner in about three weeks but can anyone help with any other ideas as to help bring mileage back up some....I know it is what is and you get what you get when you do what you do but i figure it never hurts to try.

[Raul@Stealth Automotive]

the dealer can only do up to 35" tires... you will have to do a tru speed or something in that nature so that you can fix it....
true speed: Stealth Automotive. Superlift TruSpeed Speed Sensor Recalibrator
or you could go with a programmer style that can only do tires and not gears if you ever decided to do a gear swap...superchips tirepaq is what i would do... let me know if you have any questions

-Raul

[scagle1]

Thanks for the lead towards the tirepaq sure seems to offer alot more function wise for a few more dollars than the truspeed.

[IanThrones]

I was a the dealer friday to get my adjusted for 315's and the computer tech said that it couln't be done on a f350 and he wouldn't waste my money trying