Should rear wheels spin freely when car jacked up on wheel drive in neutral?

In a rear-wheel drive car, when the car is jacked up and the wheels are in neutral, the rear wheels should not spin freely. This is because the driveshaft is still connected to the rear wheels, and when the engine is running, the driveshaft will turn. This will cause the rear wheels to turn even if the transmission is in neutral.

On the other hand, in a front-wheel drive car, the rear wheels should spin freely when the car is jacked up and the wheels are in neutral. This is because the front wheels are the ones that are connected to the engine and transmission.

There could be a few reasons why the rear wheels are still spinning on a rear-wheel drive car:

- The parking brake is engaged: Check to make sure that the parking brake is not engaged. If the parking brake is engaged, it will prevent the rear wheels from spinning freely.

- The driveshaft is damaged: If the driveshaft is damaged, it could cause the rear wheels to spin freely.

- The transmission is in gear: Make sure the transmission is in neutral. If the transmission is in gear, the rear wheels will be locked and will not be able to spin freely.

- There is a fault with the differential: If the differential is faulty, it could cause the rear wheels to spin at different speeds.