Why Doesn't the Manual Transmission Car Move When in Gear?

1 Answers
Jeremiah
07/29/25 6:54pm
Here is an introduction to the reasons why a manual transmission car doesn't move when in gear: Possible causes: The car not moving when in gear may be due to an automatic transmission oil pan leak, with all hydraulic oil leaked; the linkage or cable between the control lever and the manual valve rocker arm is loose, keeping the manual valve in neutral or park position; the oil pump intake filter screen is clogged; severe leakage in the main oil circuit; or the oil pump is damaged, etc. Functional comprehensive faults: These involve the clutch, transmission, and drive axle. When diagnosing, the fault location should be determined first, starting with checking the condition of both wheels. The diagnostic sequence generally goes from the drive wheels 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. If lifting the rear axle and rotating one rear wheel causes the other rear wheel to rotate in the opposite direction but the drive shaft does not follow, it indicates that all the rivets of the differential bevel gear are sheared off. If the other rear wheel does not rotate, the half shaft should be disassembled and inspected for breakage.
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