No Active Intervention Request
The vehicle is delivering torque without a detected wheel-slip or high-load shift event requiring reduction.
Selected limit removed
MG Flasher Custom Code · Dynamic Torque ManagementTCU Torque
TCU Torque
Limiter Bypass
The transmission control unit (TCU) can request engine-torque reduction. On supported Gen 1 and Gen 2 setups, MG Flasher Custom Code dynamically removes selected TCU-requested limits when no intervention is required, while still allowing torque reduction during detected wheel slip, launches and demanding gear changes.
Part of the MG Flasher software layer Explore Custom Code →Gen 1 & Gen 2Supported configurations
Automatic LogicNo manual value during driving
No CCMNo steering-wheel submenu
Engine-SideNot a complete TCU tune
OverviewDynamic Response to
Dynamic Response to
TCU Torque Requests.
The transmission control unit can request torque reduction from the engine ECU. On a tuned vehicle, those requests can restrict the intended engine output even when the current operating condition does not require intervention.
The current MG Flasher strategy is dynamic rather than one fixed app-set limit. It removes supported TCU-requested limits when intervention is not required and allows the requested reduction to remain during detected wheel slip, a launch or a demanding gear change.
Simple Definition
Remove the limit when no intervention is required.
DriveNo intervention request
→BypassSelected limit removed
↔TCU RequestReduction retained during documented events
Dynamic Logic
Three Operating Conditions.
The current feature responds to documented drivetrain conditions instead of using the original static app-set limiter.
Wheel Slip Detected
The TCU-requested torque reduction can remain available during a detected traction event.
TCU reduction retainedLaunch or Demanding Gear Change
During a documented high-load transient event, the requested TCU torque reduction can remain active.
TCU reduction retained
Feature EvolutionFrom a Static Limit
From a Static Limit
to Dynamic Control.
The current strategy is more context-aware than the original implementation.
Static App-Set Limiter
The feature was initially introduced for Gen 2 vehicles before transmission tuning was widely available. The earlier implementation operated as a static torque limit configured from the MG Flasher app.
Dynamic TCU Limit Bypass
The current strategy dynamically removes the relevant limits when no intervention is required and allows them when traction or high-load shift conditions call for torque reduction.
The static app-set limiter describes the original implementation only.
The current feature operates automatically. Users should not expect a current torque-value slider, steering-wheel CCM position, Live Control card or Custom Code Diagnostics control for this function.
Important DistinctionBypass Feature
Bypass Feature
vs. Transmission Tune.
TCU Torque Limiter Bypass changes how compatible engine-side Custom Code responds to torque-limit requests from the transmission. It does not flash or recalibrate the TCU. A complete transmission tune can address broader behaviour such as shift strategy, clutch pressure, shift timing and TCU-specific limits.
The correct solution depends on the vehicle, transmission, torque level and tuning goals. Some setups may still benefit from or require a dedicated transmission calibration, and this engine-side feature should not be presented as its replacement.
Torque-Limit Interaction
- Dynamic response to TCU-requested limits
- Allows intervention when traction requires it
- Runs through compatible engine-side Custom Code
- Does not modify TCU shift calibration
- Availability depends on exact ECU support
Transmission Calibration
- Can modify shift strategy and behaviour
- May change transmission torque limits directly
- Uses transmission-specific software
- Must match the complete drivetrain setup
CompatibilityAvailable on Supported
Available on Supported
Gen 1 and Gen 2 Setups.
Current documentation lists the feature for supported vehicles from both generations, but availability still depends on the exact ECU software and compatible Custom Code release.
Gen 1 or Gen 2
The current feature documentation states availability on supported vehicles from both generations.
Compatible Release
The exact ECU software must support a Custom Code version that includes this feature.
Supported Configuration
The vehicle’s engine, transmission and calibration must be compatible with the intended torque level.
Check in the App
Use the latest MG Flasher app to identify the connected ECU software and confirm exact support before purchasing or flashing.
Do not assume compatibility from the engine or model name alone.
ECU software, Custom Code version, transmission type, current calibration and power level can all affect availability and suitability.
Current control method: automatic Custom Code logic.
TCU Torque Limiter Bypass has no dedicated CCM 1K–7K position, Live Control card or Custom Code Diagnostics control. It operates automatically when the compatible feature is present in the flashed Custom Code configuration.
Why It MattersContext-Aware Handling
Context-Aware Handling
of TCU Torque Requests.
The feature is designed to improve calibration flexibility without treating every TCU torque request the same way.
Fewer Unwanted Limits
Compatible setups can avoid unnecessary TCU-requested torque restriction during normal high-output operation.
TCU Reduction Retained
The documented torque-reduction request can remain available when wheel slip or a demanding transient event is detected.
Dynamic Instead of Fixed
The current logic responds to the operating condition rather than relying only on one static value.
Automatic Engine-Side Logic
The current function runs inside compatible DME Custom Code rather than through a manual app or steering-wheel control.
Legal & Setup ResponsibilityA Software Bypass Does Not
A Software Bypass Does Not
Increase Drivetrain Capacity.
Removing a software limitation does not increase the mechanical capacity of the transmission, clutch packs, driveline, tires or other components. The tune and requested torque must remain appropriate for the complete setup.
Vehicle condition, transmission condition, clutch capacity, temperature management, tires and calibration quality remain essential at elevated torque levels. Validate meaningful changes in a controlled environment, not on public roads, and verify applicable road-use, insurance and motorsport requirements.
Transmission condition
Confirm the transmission and complete driveline are mechanically healthy before raising torque output.
Appropriate calibration
The engine tune, torque model, fuel and hardware must suit the complete vehicle setup.
Traction and tires
Available grip, tire condition and temperature affect how much torque can be used effectively.
Temperature management
Transmission and engine temperatures must remain within suitable operating limits.
Controlled validation
Review vehicle behaviour and logs after meaningful changes in a safe, controlled environment.
Professional support
Use an experienced tuner or dealer for high-output, unusual or uncertain configurations.
Feature availability is not a safety certification.
The vehicle owner, tuner and user remain responsible for drivetrain suitability, legal compliance and safe operation. Performance software may be restricted by local road-use or competition rules.
FAQTCU Torque Limiter
TCU Torque Limiter
Bypass FAQ.
Common questions about dynamic torque-limit management in MG Flasher.
What does the TCU Torque Limiter Bypass do?
It dynamically removes supported torque limits requested by the TCU when intervention is not required, while allowing torque limitation during wheel slip, launches or demanding gear changes.
What does TCU mean?
TCU means Transmission Control Unit. It is the transmission controller that can request engine-torque reduction from the DME during supported operating conditions.
Can I control the current bypass through the app or steering wheel?
No. The current implementation is automatic. It has no dedicated CCM position, Live Control card or Custom Code Diagnostics control.
Is the old app-set static limiter still the current method?
No. The static app-set limiter describes the original implementation. The current strategy dynamically handles supported TCU torque-limit requests.
Does this feature change shift speed, clutch pressure or shift strategy?
No. Those are transmission-calibration functions. TCU Torque Limiter Bypass changes the engine-side response to supported torque-limit requests and is not a full TCU tune.
Is the feature available on Gen 1 and Gen 2 vehicles?
Current MG Flasher documentation states that the feature is available on supported Gen 1 and Gen 2 vehicles. Exact ECU and Custom Code compatibility must still be confirmed.
Is this the same as a full transmission tune?
No. The feature manages compatible TCU torque-limit requests through engine Custom Code. A full TCU tune can change broader transmission-specific behaviour and calibration.
Does the bypass permanently disable all torque intervention?
No. The current strategy is dynamic and can allow torque reduction when wheel slip, a launch or a high-load gear change requires intervention.
Does removing the limiter make the transmission mechanically stronger?
No. Software cannot increase the physical torque capacity of the transmission or drivetrain. The calibration must remain suitable for the hardware and vehicle condition.
How do I check whether my vehicle supports this feature?
Connect with the latest MG Flasher app, identify the exact ECU software, check compatible Custom Code support and confirm the feature before flashing.
Check Your Drivetrain Setup
Confirm Dynamic TCU Limit Support.
Confirm the exact ECU software, compatible Custom Code and complete drivetrain suitability before using a calibration with higher torque output.