Maximum Transmission Torque Capacity (Clutch Pressure/Current)

To minimize clutch slip and protect the factory clutches from excessive wear, we have increased the transmission’s torque capacity to its physical limits. Clutch slip, which can occur during gear shifts or transient responses, is particularly common in high-powered vehicles with substantial grip and can lead to clutch damage. Our upgrade dynamically adjusts clutch pressure to prevent unnecessary strain; it only increases pressure as needed, rather than running at maximum allowable levels continuously.

Optimized Wide Open Throttle Shift Points

The factory wide open throttle (WOT) shift points are calibrated for the stock vehicle output. However, with tuning, these shift points can be optimized to improve acceleration. The supercharged 3.0T engine reaches peak power roughly 1,000 RPM higher than the factory shift points. To maximize performance, we recommend using our ECU and TCU upgrades together, with tailored maps for both stock and upgraded pulleys, including ultracharger setups.

Optimized Shift Strategies

Our TCU upgrade fine-tunes the transmission’s shifting behavior based on the vehicle’s driving mode, whether you’re braking, accelerating, or shifting under different torque loads. For everyday driving, we’ve smoothed shifts at part throttle and low torque for enhanced comfort. In contrast, during high-torque, high-RPM scenarios—ideal for track driving—shifts become more aggressive. Shift speeds are significantly improved, and maximum acceleration modes (AMAX) are enabled across gears for peak performance.

Who we are - We’re a global automotive engineering firm nestled in Opelika, Alabama. Our 80,000ft² state-of-the-art facility is home to some of the best engineers in the industry, who have mastered hundreds of engine management systems. We have multiple engine and chassis dynos, and the resources necessary to create our TCU Upgrades in-house, from the ground up! We're not a new company either. We've been around since the 90's and we have a strong financial backing to ensure we'll be here to support you for decades to come!

What we do - We optimize everything to make your transmission more capable. We don’t take shortcuts, and we don’t take risks. We do it the right way.

How we differ - With our proprietary calibration and direct ram access data logging tools and operating system code changes, we’re able to make some of the best TCU upgrades, without needing costly end user adjustments.

Purchasing, Guarantee, and Updates

Purchasing Options¹: Locate an APR Dealer. They will physically install software on your vehicle at their location. Alternatively with the APR Remote Tuning Service (RTS) you'll purchase an APR Tuning Cable and we, or a participating dealer, will remotely install software on your vehicle†.

Money-Back Guarantee: Try our Software Upgrades for up to 30 days, risk free! If you are not satisfied, have it removed and refunded.²

Free Updates: If we make an update, add a standard feature, or if the manufacturer issues an update, you are entitled to a free update.³

1. Availability: APR Software may not be available for all vehicles. Stages, programs, and features may not be available for all ECUs.

2. Money Back Guarantee: Excludes some Software Upgrades, such as those included with a hardware purchase. Labor charges are at the discretion of the installer.

3. Free updates: Subject to availability. Labor charges are at the discretion of the installer. Applicable to the original purchaser. Second hand owners may inquire with an APR Dealer about a software license transfer fee.

†. Remote flashing: Excludes APR Plus. Excludes some platforms. Dealer participation will vary. Visit our product page for details.