What happens to engine torque when all drive wheels are spinning?

When all drive wheels are spinning, engine torque reduces due to a phenomenon known as wheel slip. This typically occurs when there is a loss of traction between the tires and the road surface. In such cases, the engine continues to produce power, but because the wheels cannot grip the road, much of the engine's torque is not effectively transferred to the ground. Instead, it can result in the wheels spinning freely without acceleration.

Additionally, when spinning occurs, the vehicle's engine control system may intervene to limit torque output to maintain vehicle control and prevent further slipping. This is particularly important in maintaining stability and preventing damage to drivetrain components. Therefore, in situations where all drive wheels are spinning, engine torque diminishes as the system tries to regain traction.