Just put 35X12.5 on my '02 fx4 supercrew and I need to make adjustments with the speedometer, shifting, etc...because it's running a little off with the bigger tires.

Heard some good things about hypertech programmer and was wondering if it would help my situation?

 

Get the Superchips Microtuner.

Much better tuning than Hypertech.

 

thanks for the info. why is it better and is it comparable in price?