Originally Posted by olddoggy
My 1995 Ranger came with P215/70R14 tires. I want to change to 15" wheels with P225/75R14 tires, the new tires will be 1.5" taller can I reprogram the computer with my Modis if not what can I do to keep my speed sensor in range without spending money. The sensor is in the differential thanks
P225/75R14 wont fit a 15 inch wheel.
Just bustin your chops. LOL
Seriously though all you need to do is put a different driven gear on the speed sensor. Usually by adding one tooth to the driven gear will compensate for a change in size from a 70 to a 75 ratio aspect.
You can also use a calculator for that
This site may help you figure it out.
remember the new way to measure a tire is that the 225 is the width in millimeters and the 75 is a percentage of the width that is used to show the sidewall width (height) of the tire from the surface of the tread to the edge of the rim.
Are you sure that the sensor in the rear drives the speedo? I think it is for the RWAL system. the VSS should be in the trans.I could be wrong , might want to look again.