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Why does the car engine speed up but the speed doesn't increase?

1 Answers
StMakayla
07/29/25 10:53am

This situation needs to be differentiated based on whether the engine is matched with a manual transmission or an automatic transmission. Here is the relevant analysis: 1. Manual transmission: The main reasons are problems with the clutch and transmission. The clutch acts as an intermediary for power transmission between the engine and the transmission. If the clutch friction plate slips, power loss will occur. 2. Automatic transmission: The main reason is that the torque converter is not locked. Generally, when the engine speed, vehicle speed, and throttle depth reach a certain level, the torque converter will lock. Before it locks, it is easy to encounter the situation where stepping on the throttle only makes noise but the car doesn't move.

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