Why doesn't the automatic transmission move in R gear?

[DiMadeline]

There are two main reasons why an automatic transmission car doesn't move when shifted to R gear: mechanical faults and operational issues. Fault reasons: If components like the transmission, oil pump, torque converter, control circuits, solenoid valves, or switches malfunction, the reverse gear may fail to engage. The solution is to first check if the transmission fluid level is too low, whether the main oil pressure and gear pressure are normal, then verify if the gear position switch signal is functioning properly, inspect the wiring from the transmission computer to the shift solenoid valves, and check if the gear solenoid valves are working correctly. If all these are normal, it indicates an internal control system issue in the transmission, requiring disassembly to examine internal components. Operational reasons: The reverse gear may also fail to engage if the electronic parking brake isn't released or if the gear shifting operation isn't performed properly. The solution is to check if the electronic parking brake is released and release it promptly if engaged. If the parking brake isn't the issue, the vehicle should be taken to a repair shop to check if the gear synchronizer in the transmission is stuck or if there are other faults.