Why doesn't the car move when it's in gear?

[DiMaximus]

Here are the reasons why a car doesn't move when in gear: 1. Check all parts: According to driving standards, check if the vehicle's handbrake is fully released. If there's no issue, you need to check for comprehensive functional faults involving the clutch, transmission, and drive axle. First determine the faulty part - you can start by checking both wheels and judge the fault based on actual conditions. 2. Diagnostic sequence: When a car doesn't move in gear, the diagnostic sequence should be from the drive wheels forward through the rear axle to the driveshaft, then to the transmission, and finally to the clutch. If the driveshaft rotates but the car doesn't move forward, the fault lies in the rear axle. If you lift the rear axle and rotate one rear wheel while the other rotates in reverse without the driveshaft turning, it indicates all rivets on the driven bevel gear are sheared. 3. Check the transmission: If the car is in gear but the driveshaft doesn't rotate when starting, the fault is in the transmission. Remove the transmission cover to check if the shift fork is broken or if the guide block fixing screws are loose. 4. Clutch issues: If the driveshaft doesn't rotate in any gear, the fault is in the clutch. Check if the clutch is severely slipping.