How did you guys with 37” or larger tires recalibrate your speedo and odometer for the larger tires? Right now truck is 3-4mph off at 70mph and at 10miles the gps will read 11 and some change.
I’ve tried using forscan to reprogram for 37s but it keeps giving me an error upon flash.
I’ve requested new tunes for 37s but all they did was change the shift points and not let the truck lag in higher gears.
Has anyone used the Hypertech thingy.. or anything else to get an accurate speedo/odometer?
Sent from my iPhone using Tapatalk
I’ve tried using forscan to reprogram for 37s but it keeps giving me an error upon flash.
I’ve requested new tunes for 37s but all they did was change the shift points and not let the truck lag in higher gears.
Has anyone used the Hypertech thingy.. or anything else to get an accurate speedo/odometer?
Sent from my iPhone using Tapatalk
Last edited: