Corvette C8 HP Tuners TCM Transmission Tune

Unlock faster, firmer, and more responsive shifting with the HP Tuners TCM Transmission Tune for the 2020–2026 Chevrolet Corvette C8. Designed for the factory GM T46 Transmission Control Module (TCM), this custom calibration removes factory limitations and optimizes shift performance to deliver a sharper, more engaging driving experience.

Whether your Corvette is stock or heavily modified, a properly calibrated TCM tune enhances shift speed, clutch engagement, and transmission behavior while maintaining everyday drivability. Pairing a TCM tune with an ECU tune provides one of the most noticeable performance improvements, allowing the engine and transmission to work together more efficiently.

Improve Shift Performance

The factory TCM calibration is designed to prioritize comfort and smoothness. This custom calibration refines the transmission's behavior for quicker gear changes, improved shift timing, and more responsive acceleration.

Benefits include:

• Faster, quicker gear changes
• Improved shift firmness
• Enhanced throttle response
• Reduced shift delay
• Optimized clutch engagement
• Improved acceleration feel
• More consistent performance under spirited driving
• Better transmission response throughout the RPM range

Designed to Work with ECU Tuning

For maximum performance, this transmission tune pairs perfectly with an ECU calibration. Together they optimize engine output and transmission operation, delivering a smoother, faster, and more responsive driving experience.

Features

• Custom HP Tuners TCM calibration
• Supports the GM T46 Transmission Control Module
• Faster shift speeds
• Improved transmission response
• Optimized shift scheduling
• Refined clutch pressure calibration
• Enhanced drivability
• Improved performance for stock and modified vehicles
• Maintains factory drivability during normal cruising

Requirements

To install this calibration, the following are required:

• HP Tuners GM T46 TCM Unlock Service
• HP Tuners RTD4 or MPVI4 Interface
• HP Tuners Universal Credits (6 Credits)
• HP Tuners Tune Delivery Network (TDN) App or VCM Suite Software

If you have not already unlocked your TCM, the required unlock service can be added during checkout.

Available Options

Choose the options that match your vehicle during checkout:

• TCM Unlock Required or Already Unlocked
• RTD4 Interface Required or Already Owned
• HP Tuners Universal Credits Required or Already Owned

What's Included

• Custom HP Tuners TCM Calibration
• Tuning File Delivered Through HP Tuners
• Flashing Instructions
• Remote Calibration Support

Vehicle Fitment

Fits:

• 2020 Chevrolet Corvette C8 Stingray
• 2021 Chevrolet Corvette C8 Stingray
• 2022 Chevrolet Corvette C8 Stingray
• 2023 Chevrolet Corvette C8 Stingray
• 2023 Chevrolet Corvette C8 Z06
• 2024 Chevrolet Corvette C8 Stingray
• 2024 Chevrolet Corvette C8 Z06
• 2024 Chevrolet Corvette C8 E-Ray
• 2025 Chevrolet Corvette C8 Stingray
• 2025 Chevrolet Corvette C8 Z06
• 2025 Chevrolet Corvette C8 E-Ray
• 2025 Chevrolet Corvette C8 ZR1
• 2026 Chevrolet Corvette C8 Stingray
• 2026 Chevrolet Corvette C8 Z06
• 2026 Chevrolet Corvette C8 E-Ray
• 2026 Chevrolet Corvette C8 ZR1

Important Information

• Vehicle VIN is required before tuning can begin.
• The GM T46 TCM must be unlocked prior to flashing a custom calibration.
• Unlock service typically requires 1–3 weeks due to processing demand.
• This is a custom-made tuning service and is non-refundable once calibration work has begun.
• Professional installation and tuning familiarity are recommended for the best experience.