Correcting spedometer for tire size - Page 2

***907DAVE*** · #11 Mon, January 3rd, 2011, 05:19 PM

Its worth a try, but I dont know for sure.

Also be aware, the ABS module can only be re-flashed 6 times IIRC, so try and get it right the first time.

rammertide07 · #12 Tue, January 4th, 2011, 09:28 AM

Quote:

Originally Posted by 907dave

Its worth a try, but I dont know for sure.

Also be aware, the ABS module can only be re-flashed 6 times IIRC, so try and get it right the first time.

Well that is great

Thanks

***cleatus12r*** · #13 Tue, January 4th, 2011, 11:36 AM

As Dave has pointed out (thanks Dave!):

The SD trucks have to have the vehicle speed sensor data changed in the ABS module to correct the speedometer/odometer. You have 6 chances to get as close as you can.

The OBS trucks have the programmable speedometer/odometer module. The series of steps you listed there are to reset the speedometer/odometer on those trucks.

Either find a way to reprogram the ABS module for the tire size, buy a VSS inline correction box (such as the Tru-Speed), or do the math a suggested by Longshot270.

rammertide07 · #14 Tue, January 4th, 2011, 01:37 PM

Thanks for the input guys. Think I'll try that truspeed calibration. Shopping around and found it about $100 cheaper than normal list price.