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How do I set up 6L80E part-throttle and WOT shift tables after a gear and tire change in an engine swap?

Here is what the documentation says. Each point links to its source; tables and names vary by computer, operating system and tuning software.

  • Terminator X Max; LM7, LQ4, LQ9, LS3; 2007+: Basic 6L80E/6L90E TCM adjustments are done through the OBD-II port or the handheld: shift points, tire size, gear ratio, transmission relearn, diagnostic functions, and TCM OS selection. The Terminator X V3 software adds advanced control: virtual torque, virtual TPS, torque management, secondary mode, and tap shifting. (Holley)
  • GM; most GM vehicles up to 2018 model year: Skipping recalibration after a gear or tire change can cause poor shift quality, incorrect mileage tracking, and trouble codes. (HP Tuners)
  • GM; most GM vehicles up to 2018 model year: The Gear/Tire Wizard's Auto Scale option automatically adjusts transmission tables to preserve similar shift RPM after a gear or tire change. (HP Tuners)
  • GM; most GM vehicles up to 2018 model year: On GM vehicles, gear and tire changes are corrected with the Gear/Tire Wizard in VCM Editor, which recalibrates the speedometer and scales the transmission tables. (HP Tuners)

More in transmission tuning, or build a checklist for your swap with the tune checklist tool.

Confidence: medium — sources disagree or are limited; check the sources below.

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