TCU-DQ381-MQB-EVO
APR TCU Transmission Performance Software For VW MK8 GTI
The DSG transmission found in the new 2022+ Volkswagen GTI is nothing short of amazing. It's incredibly fast and capable and requires no hardware upgrades to hold dramatically more torque than what's possible on other transmissions. However, from the factory the transmission tells the engine to limit power and torque. Our engineers fix this by recalibrating the system to maximize torque capacity and clutch pressure to avoided transmission slipping and damage, and in doing so allows the engine to dramatically increase horsepower and torque! We saw 25-32 WHP and 34-44 WFT-LBS of torque, depending on octane, simply by adding our TCU Upgrade on top of our Stage 1 ECU Upgrade on an otherwise stock MK8 GTI. This and other changes make the TCU upgrade necessary on any tuned vehicle.
Increased Horsepower And Torque
From the factory the Transmission Control Unit (TCU) tells the Engine Control unit (ECU) to reduce torque to prescribed factory limits, which greatly impacts the horsepower and torque gains from our ECU upgrade. We increase these limits and make other critical changes to ensure the transmission can withstand the increased output to allow the engine to achieve more power and torque! On our MK8 GTI with the new 2.0T EA888.4 engine, we dyno tested the vehicle with each octane on our ECU Upgrade with no other hardware. We saw an additional 25-32 WHP and 34-44 WFT-LBS of torque simply by adding our TCU Upgrade. The TCU upgrade transforms the vehicle and makes it significantly more fun to drive. It’s almost like getting tuned all over again!
Maximum Transmission Torque Capacity, Clutch Pressure, And Safety
We’ve recalibrated transmission limiters to allow the transmission to see more torque, and to prevent clutch, we’ve also recalibrated clutch pressure. This relationship is dynamic. As the transmission sees more torque, pressure is increased progressively as to not overstress the system or create harsh shifting. Furthermore the system is expertly recalibrated to the physical limits of the system. Too much pressure can blow out physical seals, and too much current can damage electrical components. We don’t simply turn off the limits and crank pressure to the maximum as a finely tuned balance is necessary for component safety.
Optimized Wide Open Throttle Shift Points
The factory wide open throttle shift points were designed to match the factory output of the vehicle. With tuning, they can be optimized future to improve acceleration times. For the best results our ECU and TCU upgrade must be used together.
Optimized Launch Control Strategies
From the factory launch control is heavily regulated and limited resulting in a muddy launch as the transmission and engine fight to control torque. This is completely contrary to other DSG transmissions of the past and is a constant complaint on both tuned and stock vehicles as the factory method overlimits torque causing slow launches and slow 60-ft times. We’ve recalibrated the system to allow for a faster and more consistent launch, and ensured the clutches lock up to eliminate excessive clutch slip on the launch.
Optimized Shift Times
Shift timers are optimized to deliver the fastest possible shifts allowable by the transmission. Furthermore, artificial delays between requesting a manual shift and receiving one have been reduced as much as possible.
Features:
- Increases horsepower and torque on tuned vehicles
- +25-32 WHP and +34-44 WFT-LBS of torque (MK8 GTI w/ APR ECU)
- Maximizes the torque capacity of the transmission
- Increases clutch pressure to avoid clutch slipping and damage
- Optimized wide open throttle shift points
- Optimized launch control strategies
- Optimized shift times
- Protection routines and limits prevent overpressuring physical seals
- Protection routines and limits prevent overpowering electrical components
- Fully compatible with APR Plus
- Free lifetime updates
- Direct OBDII port flash (No TCU removal)
- 30 day money back guarantee
At Home APR Flashing - How does it work?
APR Software as easy as 1, 2, 3...
1. Purchase the software applicable to your vehicle (this page)
2. Purchase the required hardware (APR Cheetah Cable) or book your vehicle with us.
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
Need to go back to stock? We have solutions for that as well...
