Recent content by Dcopp13
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Speedometer Calibration
I have 275/60R20 on my 2014 expy and i think i notice a different in the way it shifts. Especially on the highway trying to pass. Seems to be in too high a gear. My stock size was 255/60R20. I am also deciding which tuner to get. The dealer says they might be able to program it for $120 but...- Dcopp13
- Post #16
- Forum: Transmission & Drive train
