Board index (Legacy) Predator Technical Discussion Predator Ford Diesel Speedometer calibration 03' F350 7.3...7170

Speedometer calibration 03' F350 7.3...7170

Predator support for Ford diesel vehicles

Moderator: mikel

Posts: 2
Hey guys, I just bought a Predator from an online dealer partly because he assured me that I could calibrate the speedometer by changing the tire size in the pcm by using this unit. It seems by reading some of the forum posts the only thing I can do is change the shift points for better response (the problem is in the abs???), but that there isn't much the predator can do to help me with the speedo/odo problem. I went from stock 265/75/r16 to 315/70/r17. I think by the time I hit 70 on the highway I'm really doing more like 76/77mph. If there is anything you can do to help it would be greatly appreciated.

Post Fri Mar 11, 2011 9:43 am

Posts: 56393
Location: DiabloSport World Headquarters

Correct, the U7170 cant correct the speedo, as that is done through the ABS module, rather than the PCM.
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
M-F 8:00 AM to 5:00 PM EST

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