APR is pleased to present the ultimate Transmission Control Unit (TCU) Upgrade for the DQ381 7-Speed DSG / S-Tronic Transmission!
APR’s TCU Upgrade dramatically improves upon the DQ500 transmission’s function, drivability, and performance through a myriad of enhancement and custom features. Normal daily driving is smoother as we’ve improved upon the normal quirks and complaints associated with the driving experience. Sporty driving is far more capable with increased torque capacity, clamping pressure, faster shifting times, more capable launch control, and more. This all comes with customizable features you can choose while flashing the TCU to personalize the transmission to your desire! Lastly the software loads to the factory TCU through the OBD-II port, resulting in a clean and headache-free install.
At Home APR Flashing - How does it work?
1. Purchase the software applicable to your vehicle (this page)
2. Purchase the required hardware (APR Cheetah Cable) - Links below
3. Complete the form that will be emailed to you after checkout. This will arrange all the necessary steps to complete the flashing process.
Required Hardware: APR Software Flashing Cheetah Cable (Get Up to 80% back of what you paid for this*)
After checkout, you will receive an email from USP Motorsports with instructions on how your ECU/TCU can be flashed.
NOTE: This software must be purchased along with a required APR Software Flashing Cheetah Cable. (Note: We highly recommend getting the complete APR At Home ECU/TCU Flashing Kit to avoid any potential issues during the flashing process)
At lower throttle input, the system doesn’t race towards the highest gear. In doing so, we keep the turbo spooled between shifts for a more enjoyable driving experience.
Shift strategy matches the output of our tuned ECU upgrades. In doing so, each gear will shift at the ideal point for the fastest acceleration.
Maximum targeted clutch pressure is raised, giving the transmission the ability to continue raising clutch pressure, as needed, to help prevent slip in higher torque situations.
Torque limits are raised, allowing the transmission to function properly at higher torque levels. In doing so, the TCU does not artificially reduce torque.
In manual mode, the transmission will allow you to downshift so long as the next gear is below redline. This includes removal of the first gear lockout.
Pulling the manual paddles results in a quicker shift with artificial delays and lag times removed and reduced.
Shift times are reduced to be as fast as physically and mechanically possible by the transmission. During cruise and light throttle, shift times are transitioned to a slower comfort mode. During a launch, AMAX mode is enabled for high torque shifts.
Maximum allowable RPM has been increased to match the output of our ECU software.
We’ve reduced the delay experienced when pulling away from a stop for a more natural driving experience.
When flashing the transmission, you can choose to have manual mode auto up-shift at redline or stay in gear and bounce off the limiter until you manually shift.
When flashing the transmission, you can choose your maximum launch RPM, which includes 3 launch RPMs that are selectable depending on throttle position.
We’ve greatly reduced the delay experienced after you release the brake pedal for a quicker reaction time when using launch control.
Launch control can be used with ESP on. In some situation with the right setup this may improve your launch, although ESP will get in the way with too much tire slip.
There’s no software limit to the number of launches possible on the transmission.
Drive, sport and manual mode all display the current gear in the MFD, digital dash or virtual cockpit.