Measured rollout and completed the math to adjust for my larger tires:
Tire Size in inches: 31.03105096
Gear Ratio: 3.42
VSS Teeth: 40
Tire Circumference: 97.4375
Tire Revs/Mile: 650.2629891
PPM: 88955.97691
Output Shaft Revs/mile: 2223.899423
With the stock file, both the computer and speedometer/gauge cluster read ~7.75% off which is expected.
When I put these settings into the VCM with a calibration only write, the computer reads correct to GPS but the speedometer/gauge cluster are still off by ~7.75%. What am I missing?
Thanks for your help!