DIESELR RTD4 T93 TCM Tune Files (2024-2026 Duramax L5P 6.6L) - Global B

The Dieselr RTD4 T93 TCM Tune Files are developed specifically for 2024–2026 GM Duramax L5P 6.6L trucks equipped with the Global B T93 Transmission Control Module. These calibrations are designed to correct factory transmission behavior when real-world torque, load, or tuned engine output exceed stock limits.

On Global B platforms, the factory T93 strategy relies heavily on torque management and adaptive shift logic. As power increases—or when the truck is consistently towing or hauling—this can lead to soft shifts, delayed engagement, and unnecessary torque reduction. Dieselr TCM tuning refines this behavior directly at the transmission level.

Tune Delivery & Compatibility

• Delivered through TDN (Tune Delivery Network)
• Compatible with RTD4 and MPVi4
• Designed exclusively for GM Global B platforms
• Requires 4 tuning credits (not included)

What This TCM Tune Improves

• Optimized shift scheduling and shift pressure
• Reduced unnecessary torque reduction during shifts
• Improved clutch control and gear engagement
• More consistent drivability under load and towing
• Designed to complement Dieselr engine tuning (sold separately)
• This product includes transmission-only tuning for the T93 TCM. Engine tuning is not included unless purchased separately.

Important Notes

• For off-road / competition use only, where applicable
• Vehicle must be equipped with a Global B T93 TCM
• RTD4 or MPVi4 interface required