Transmission Tune Only for EFI Live Spade

Features:

• Custom TCM transmission calibration
• No additional license required
• Uses existing EFI Live hardware
• Smoother, more precise shifting
• Improved torque converter lockup strategy
• Increased clutch holding capacity
• Prevents short shifting under load
• Keeps engine in optimal rev range
• Optimized for larger tires
• Supports modified turbo applications
• Enhances towing performance and control
• Maximizes power to the ground

Put The Power To The Ground With Smarter Shifting Control

If you have added power to your 2012 Silverado or Sierra 2500HD or 3500HD and feel like the transmission is not keeping up, this Transmission Tune is the missing piece. The factory TCM calibration is conservative, especially once you introduce ECM tuning, larger tires, or performance upgrades. With this custom transmission tune, shifts become smoother yet more decisive, giving the truck a stronger and more confident feel. Torque converter lockup strategy is optimized so more of your engine’s power actually makes it to the pavement instead of getting lost in slippage. You will notice better control when towing, improved response when accelerating, and a truck that simply feels more connected. It also helps prevent short shifting under load, keeping the engine in its sweet spot when climbing grades or merging onto the highway. Best of all, no additional license is required and you can use your existing EFI Live hardware to flash the TCM.

Advanced TCM Calibration Designed To Support Real World Modifications

This Transmission Tune is engineered to work hand in hand with your ECM tuning, ensuring both modules operate as a coordinated system. Line pressure is carefully adjusted to improve clutch holding capacity, which is especially important for trucks running higher torque levels or built transmissions. Shift timing and torque converter lockup points are recalibrated to better match a wider torque curve, helping the engine stay within its preferred rev range. This becomes even more critical for trucks equipped with 35 inch or larger tires, modified turbos, or any setup that alters operating RPM. By reducing shift lag and optimizing gear changes, the tune minimizes time between gears and maximizes time applying power to the ground. The result is improved drivability, stronger towing performance, and a transmission that feels purpose built for your modifications rather than held back by factory programming.

Fitment: 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Fits 2012 GM 6.6L Duramax LML only
• Transmission tuning only, no ECM changes
• Requires existing EFI Live hardware
• No additional license required
• Designed to complement ECM tuning
• Highly recommended for tuned trucks
• Important for 35 inch or larger tires
• Beneficial for modified turbo setups
• Supports built or upgraded transmissions
• Improves towing control and performance
• Optimizes torque converter lockup strategy
• California Proposition 65 warning applies