Switching tires and wheels on Ram 2500. TPMS?

mrkoje wrote:
I think you will want the dealer to take the TPMS out of the 17" wheels on your 2013 and install them into the 20" 2014 wheels. Then they will need to get into the computer via the ODB2 port and select the new wheel/tire size so your truck computer has the correct wheel settings.

I could be wrong but I do remember some talk of the sensors being different between 2013 and 2014 - shouldn't be a problem though taking the 2013 sensors out of your old wheels and installing them into the new wheels.

TPMS only measure air pressure and have nothing to do with the tire diameter and the odometer and speedometer accuracy. You can move them to the new rims and then the truck needs to be reset to recognize each new tire position on the truck. The tire shop can do this for you are you can follow a sequence where you let out the air from each tire in turn to generate the correct settings in the truck's computer.

Unless the new tire diameter is the same as a factory provided tire size the dealers probably will not be able to make the change in settings. GM could not do it for my new tires that were 4% larger in diameter. Not a big deal as it meant the truck as at 52 MPH when the odometer read 50 MPH and when the odometer showed a distance traveled of 100 miles it was actually closer to 104 miles. As it turned out with a heavy load on the rear wheels the odometer was accurate with the new tires as the tire height with the load was the same as for the factory tires with no load.