A friend has a Ford 2002 F-250 that he installed 37 inch tires on and is wondering if there is a box out there that will correct speedometer readings.

 

Superlift makes one for like $200. Also corrects for gear changes. Those hypertech programmers can do the same thing.

 

I've got the superlift on mine, love it. Never had a problem with it. Found a good way to set it also. Those radar signs at construction sites are pretty accurate. Then check it with the mile signs to be sure.

 

Thanks, I went to the site and printed out the information and gave it to her. Looks like that is what she needs for her truck.