ABS engaging after larger tires on 09 Tahoe when turning

Looking into how to scale the tables. Been years since I have played with HP. Things have changed a lot! Searched around with no luck. The tables I have stock are VSS tire revs per: Dist 379.69, Dist err 37.34, Dist Trans 653.39, Dist T Err 653.39. According to EC Tunes spread sheet My old tire is a 30.8" and the new is 32.3" according to a rollout. My question is why do the stock numbers seem incorrect? What am I missing? Shouldn't the ECM dist be 653.39 Tire revolutions per mile and the trans be larger since the driveshaft spins faster? Shouldn't VSS PPM be a large number? Thanks in advance for any direction!

Any help appreciated

Did you use the gear/tire wizard to change the tire size and then hit auto scale?? It's under the edit tab.

That's all I've ever done and never got any lights. I went from a 29-30in tire on my sierra and to 31.9 tires and it worked great.

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Originally Posted by 5FDP

Did you use the gear/tire wizard to change the tire size and then hit auto scale?? It's under the edit tab.

That's all I've ever done and never got any lights. I went from a 29-30in tire on my sierra and to 31.9 tires and it worked great.

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Thanks for the reply. Yes i used it and it improved the shifting and corrected the speedo. Nothing I adjusted seemed to effect the MPH the ABS computer was seeing. Must be pulling wheel speed directly from the sensors. I have the ABS cycling on tight turns.

the is a spot in speed calibration,

abs out pulses

needs to be corrected the same amount as calibration for speedo
therefore abs,pcm, jive