What causes an automatic transmission to maintain high RPM without shifting up?
1 Answers
Automatic transmission maintaining high RPM without shifting up is likely due to an issue with the vehicle's transmission control module (TCM). You can have a technician adjust the computer at a repair shop or replace the transmission sensor yourself. Below are relevant details: 1. Normally, for a new automatic transmission car, the RPM should stay below 4000. Over time, as the engine and gears experience fatigue, the transmission's response may slow down. If the engine control unit (ECU) hasn't been reprogrammed, the normal RPM range should remain between 3500-4000. 2. Additionally, it depends on the transmission structure and current driving speed. Typically, knowing the car model, transmission structure, and engine displacement is necessary to assess the transmission's efficiency ratio. However, under normal urban road driving conditions, most vehicles operate between 3500-4000 RPM.