General Motors Active Rev Match Technology
Active Rev Match (ARM) is a General Motors propulsion technology for cars with manual transmissions that blips the throttle to put the engine at the perfect RPM (revolutions per minute) for a downshift.
Active Rev Match aims to aid the driver in executing a smooth and optimized downshift by managing the engine speed.
When a skilled driver needs to downshift – for example, at the apex of a corner – they depress the clutch pedal and move the gear lever. At the same time, they blip the throttle to increase engine RPM. This matches the engine’s speed to the wheel speed for a smooth shift that keeps the car settled and the engine in its optimal power band for the lower gear.
Active Rev Match automates the process of blipping the throttle. As soon as a driver depresses the clutch and begins to downshift, the feature automatically revs the engine to match the wheel speed, without the driver needing to press the accelerator pedal. This process takes place instantly.
How It Works
In a performance vehicle with a manual transmission, Active Rev Match monitors the position of the clutch and relies upon one or more position sensors inside the gear lever H-gate assembly. When it detects the lever moving in the direction of a downshift gear and the clutch is depressed to a certain threshold, the engine control module (ECM) relies upon clever programming to adjust the engine’s throttle so that the engine’s output speed rises to an optimal level. This level varies based on the vehicle’s driving mode.
When a downshift begins, Active Rev Match holds the engine at the higher RPM until either the downshift is completed, the downshift is canceled (the clutch pedal is released and the transmission remains in its original gear), or a specific amount of time elapses. In any of those scenarios, once an Active Rev Match event ends, it is again up to the driver to maintain the speed of the engine.
Vehicles with Active Rev Match allow complete activation/deactivation of the system via either of the paddles behind the steering wheel.
Active Rev Match is beneficial in that it promotes smooth, effective downshifts while decreasing drivetrain wear and reducing the risk of a wheel-lockup event during downshifts.
Active Rev Match is standard on the following General Motors vehicles:
- 7th-generation (C7) Chevrolet Corvette (2014-2019):
- All models with 7-speed TREMEC TR-6070 manual transmission
- 6th-generation Chevrolet Camaro (2016 and newer):
- SS with 6-speed TREMEC TR-6060 manual transmission
- ZL1 with 6-speed TREMEC TR-6060 manual transmission
- Cadillac ATS-V (2016-2019):
- Sedan and Coupe with 6-speed TREMEC TR-6060 manual transmission