SCT Speedo Adjustment

[BenRM94]

I have a 2001 Explorer that I recently changed the tire size on. I also have an SCT SF3 programmer, so I thought I wouldn't have any problems with my speedo, but here I am :thumbdwn:. I have tried changing the tire revolutions per mile, and I've tried changing the axle ratio, but neither has any effect. I have tried many different tire rpms on the tuner but nothing changes, the speedo is still off by over 10%. (says I'm doing 50 when I'm only doing 41). Has anyone else run into this problem? Has anyone adjusted their tire revolutions per mile with their SCT programmer and had it work properly? Thank you for the help.

 

[BenRM94]

SCT says it can't adjust the speed reading in the abs module? Has anyone else had an issue adjusting a 98-2001 explorer speedo with an SCT tuner?

 

[MuscleJunkie]

X4 doesn't even have the option. Need to get the dealer to do it.

 

[Turdle]

Geez, how tiny of a tire did you fit?


When I went from stock tires to 31's I did not notice a difference. I now match speed with those little camera trailer radar units.