What is the reason why the car cannot move after shifting gears?
2 Answers
Reasons why the car cannot move after shifting gears: Leakage in the automatic transmission oil pan, causing all hydraulic oil to leak out; The linkage or cable between the control handle and the manual valve rocker arm is loose, keeping the manual valve in the neutral or parking position; The oil pump inlet filter screen is clogged; Severe leakage in the main oil circuit; The oil pump is damaged. Here is additional information: 1. The car not moving after shifting gears is a comprehensive functional fault: (1) It involves the clutch, transmission, and drive axle. When diagnosing, the fault location should be determined first, and the condition of both wheels can be checked initially. (2) The diagnostic sequence generally starts from the drive wheels, moving forward through the rear axle to the drive shaft, then to the transmission, and finally to the clutch. If the drive shaft rotates but the car does not move forward, the fault lies in the rear axle. (3) Lift the rear axle and rotate one rear wheel. If the other rear wheel rotates in the opposite direction but the drive shaft does not rotate, it indicates that all rivets of the driven bevel gear are sheared off; If the other rear wheel does not rotate, check if the half-shaft is broken. 2. If the car does not move when starting in a certain gear and the drive shaft does not rotate, the fault is in the transmission: (1) Remove the transmission cover and inspect whether the transmission shift fork is broken or if the guide block fixing screws are loose. If the above checks are normal, proceed with the gear shifting test. (2) If the second shaft does not rotate in a certain gear, it means the half-round key of that gear is sheared off; If the second shaft rotates in direct drive but does not rotate in other gears, it indicates that the support bearings at both ends of the intermediate shaft are disassembled, causing the intermediate shaft to drop. (3) If the drive shaft does not rotate in any gear, the fault lies in the clutch. Check whether the clutch is severely slipping, whether all rivets of the driven disc spline hub and steel plate are sheared off, or whether the steel plate is broken.
I've been driving for over a decade and have encountered situations where the car doesn't move after shifting gears several times, usually due to clutch problems. For example, severe wear of the clutch disc or a burnt pressure plate can interrupt power transmission. When shifting gears, you feel the engine running but the car doesn't move, as if it's idling, which is a typical symptom. It could also be a transmission issue, such as stuck gears or damaged synchronizers in a manual transmission, or a malfunctioning valve body or hydraulic system leak in an automatic transmission. Don't overlook operating habits; not pressing the clutch pedal deep enough or forgetting to release the handbrake can also cause the car to stall. If you encounter this problem, you must stop in a safe place and check the clutch pedal travel. If it feels soft with no resistance, immediate repair is necessary. Otherwise, dragging the car can damage more components. It's advisable to find a reliable repair shop nearby for a thorough inspection.
