1. Failed Transmission:
- Internal mechanical failure may cause the gears to not engage properly, thus rendering the transmission unable to transfer power to the wheels.
2. Neutral Safety Switch:
- A faulty neutral safety switch may prevent the car from starting or moving out of gear. This switch ensures the vehicle can't be started unless it is in Park or Neutral.
3. Broken Drive Shaft:
- If the driveshaft connecting the transmission to the wheels is broken, power won't be transmitted, resulting in no movement.
4. Worn Clutch (Manual Transmission):
- In a manual transmission car, a worn-out clutch can slip, causing the engine to rev but the car not to move.
5. Transmission Control Module (TCM) Issues:
- In vehicles with electronic gear shifters, a faulty TCM may disrupt communication between the shifter and the transmission, resulting in no movement.
6. Low Transmission Fluid:
- Inadequate transmission fluid compromises its ability to lubricate and engage gears properly, leading to transmission failure and lack of movement.
7. Faulty Torque Converter (Automatic Transmission):
- A faulty torque converter in an automatic transmission prevents sufficient power transfer from the engine to the transmission.
8. Failed CV Joints:
- If the CV joints (constant velocity joints) that connect the transmission to the wheels are worn or broken, they can impede power transmission.
9. Parking Brake Engaged:
- Ensure the parking brake is disengaged, as it can restrict movement if accidentally left on.
10. Seized Brake Calipers:
- When brake calipers seize or excessively bind on the wheels, they can create enough resistance to prevent the car from moving.
