FORScan Tire Size Adjustment For 37 Inch Tires

bigastrk · Jul 30, 2018

Please keep us updated. I didn't get a CEL for my air intake until about 100 miles or so. Not sure if yours will be the same results but I'm staying tuned in to find out.

BuiltPowerStrokeTough · Jul 31, 2018

Ive got about 400 miles so far of all kinds of driving conditions since I changed the tire size. No CEL at all yet. Think that code worked perfect for me.

Shef · Sep 5, 2018

Finally got a chance to go by the dealer to get speedo cal'd. They cannot program for 37s, they put in the hypertech module. I had them order one and will get it in once it arrives.

BuiltPowerStrokeTough · Sep 12, 2018

UPDATE: Still no CEL or any issues after I changed in the BdyCM module to 726-12-01 xxxx 0AAE xxxx with Forscan. Speedo off 1-2 MPH at 70 MPH. Definitely worth using this code if you dont want CELs and you use Forscan and are running 37s.

bigastrk · Sep 12, 2018

BuiltPowerStrokeTough said:
UPDATE: Still no CEL or any issues after I changed in the BdyCM module to 726-12-01 xxxx 0AAE xxxx with Forscan. Speedo off 1-2 MPH at 70 MPH. Definitely worth using this code if you dont want CELs and you use Forscan and are running 37s.

I just did it today. I am wondering if this has a different effect on each individual truck based on axle ratios. I will report back if I get a CEL. So far 45 miles and nothing yet.

thompson569 · Dec 26, 2019

I know it's been over a year since the last reply but I tried this setting today and I'm getting a CEL and the trouble code is saying Axle / Tire Size Out of Range. My truck is a 2019 so just wondering if something may have changed since then.