2001 - 2004 GM 6.6L LB7 Duramax | Allison Transmission Tuning by PPEI (PP-LB7-TT)

PPEI transmission calibration

Part / service PP-LB7-TT from PPEI.

Transmission calibration from PPEI (Power Performance Enterprises) to refine shift timing and torque-converter strategy on the diesel HD application listed.

Confirm tool compatibility and vehicle configuration before ordering — flashing requirements vary by year and ECM/TCM.

Who it's for

Diesel HD owners who already have (or are buying) a compatible flashing tool and want PPEI’s transmission calibration or TCM service for the platform listed.

Key specs (per PPEI)

What's included

• PPEI transmission calibration file / license as sold for this PN
• Flash instructions as PPEI publishes for the listed tool

Fitment notes

• Confirm engine, years, transmission, and ECM/TCM against PPEI’s product page for PP-LB7-TT.
• Have the correct flashing device and licenses before purchase.
• Application notes: GM Duramax Ram / Dodge Cummins 2001-2004.

Professional install available at Powertech Diesel, Idaho Falls — call 208-542-7793.