2001-2004 LB7 Allison 1000 Transmission Tuning

Standalone Allison 1000 transmission calibration for the 2001–2004 LB7 6.6L Duramax — ideal for owners who already have an engine tune and want the drivetrain to match.

What's included

• Custom VIN-matched Allison 1000 TCM calibration
• Shift pressure, shift timing, and torque converter lockup tuning
• Calibration tuned to handle increased engine output without excessive clutch slip

How it works

Files are delivered via EFI Live FlashScan V2. The calibration is built from your stock TCM file and locked to your VIN. A FlashScan V2 device is required to flash the TCM.

Support tiers

• Limited (4 Weeks): Four weeks of revision rounds after initial delivery; tune remains on your tool after the window closes.
• Full (Lifetime): Unlimited revisions and lifetime access.

Requires an EFI Live FlashScan V2 device. Transmission tune only — does not include LB7 engine calibration.

Calibrations are developed for motorsport and off-road use. Verify local regulations before use on public roads.