Driveshaft spinning

My vehicle starts and can go into gear; however, once in gear, it doesn't move. I just hear the driveshaft spinning.
Experienced mechanics share their insights in answering this question :
If the driveshaft is spinning, that means power is flowing through the transmission to the drive shaft. If this is the case, the problem is inside the rear differential. The rear differential receives engine torque via the driveshaft and transfers that torque to the rear wheels. I suggest having a professional, such as one from YourMechanic, determine why your vehicle isn’t moving while in gear and make the necessary repairs.

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If the driveshaft is spinning, that means power is flowing through the transmission to the drive shaft. If this is the case, the problem is inside the rear differential. The rear differential receives engine torque via the driveshaft and transfers that torque to the rear wheels.
when motor is not running prop spins freely. so, even with the hubs unlocked, and the t- case in neutral, if the rear wheels are spinning, the front drive shaft will spin as well.
Worn out u-joints, couplers or carrier bearings can cause the driveshaft to vibrate. If you don`t get these components serviced, it can lead to further damage to other drivetrain components.
If you are dealing with an automatic vehicle, put the emergency brake on to stop the driveshaft rotating, or with a manual transmission simply put the car in gear. This will stop the shaft from rotating when you start to unbolt it from the rear yoke.
Yes, all of gears with the possible exception of the reverse gear will be rotating. The input and countershaft will be rotating and the output shaft won`t be rotating in a typical rear wheel drive transmission. All the gears on the output shaft will be freewheeling, turning on the shaft with the shaft stationary.
Most factory driveshafts are balanced between 3,000 and 3,500 rpm.
Gearboxes take the rotation of an input shaft, usually the axle of a motor, and through a series of gears alter the speed and power coming from the input shaft to turn an output shaft at a desired speed or torque.
There is some drag in the shafts, and it`s normal for the output shaft to spin in neutral, but you should be able to stop it by hand with little effort. When the oil heats up, it doesn`t drag so much.
You`re driving along and suddenly become aware that your vehicle is vibrating, or you are hearing some strange noises from the vehicle. If your car is showing any of these symptoms, you may have a damaged or unbalanced driveshaft.
If the bushings or U-joint wear out you can experience excessive driveshaft vibration. This may also result from the driveshaft not being bolted down properly or the unit being out of balance. A driveshaft that`s vibrating excessively can also cause the wearing of other drivetrain components.
Standard computer hard drives spin continuously at 7200 RPM, only stopping after a prolonged period of disuse. When you hear your hard drive hard at work, you`re actually hearing the movement of a mechanical arm containing the read/write head, which glides across the drive`s platters.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

I need the name of the part that connects my driveshaft to my transfer case.
ANSWER : Hi there, thanks for your question. The part your are looking for is called the slip joint yolk. Best of luck!

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Not turning over spinning – 1980 Mercedes-Benz 240D
ANSWER : Hello. It sounds like your starter is going bad and needs to be replaced. The starter solenoid is made onto the starter and is most likely causing the problem you are having. At some point the starter is going to stop working completely so it needs to be replaced as soon as possible. If you need help with this repair, have a certified technician, like one from YourMechanic, assist with a starter replacement.

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ANSWER : Hi there – sounds like the starter "bendix drive" has failed. This is the component on the starter motor shaft that cause the starter motor to engage the flywheel as it spins up. Somewhat unusual failure these days – but it happens. I recommend a starter replacement performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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My starter was spinning so I had a new starter replaced. drove the car for a day and it started ever time but not on Sunday afternoon as it spins fast.
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With new rear brakes, car still won’t spin on its own
ANSWER : Hello. After looking into this problem, I do not see where your vehicle has rear calipers but only drum brakes. For drum brakes, if the adjuster was not retracted enough the shoes will drag too much. If your vehicle did have a caliper in the rear and the parking brake is part of the caliper with a cable attached, then you would need to turn in the caliper piston. If you forced it in with the clamp then you most likely broke or damaged the caliper. Have a mechanic inspect the brakes for you to make sure you have not damaged them.

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Crankshaft not spinning freely 1997 Ford Ranger
ANSWER : Hi there – this engine is allegedly NOT an interference engine. Translation – if the timing belt breaks, or isn’t present, it should not be possible for the valves to contact the pistons, and cause a lack of rotation as you describe. However – first rule of engine assembly is that as soon as you do anything that cause rotation or smooth motion to cease – something is wrong, and you back up two steps. Remove the cylinder head if necessary to make sure crankshaft rotation is free, and the timing marks on the harmonic balancer truly represent Top Dead Center (TDC) for starters. Then line up the cams in the TDC position, block them with the timing alignment tools, and re-assemble the cylinder head to the engine. Good luck with this!

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How do I remove/replace the driveshaft center support bearing from the shaft?
ANSWER : Hey there. In order to replace the center support bearing you will need to remove the rear drive shaft and then drop the center support bearing and front shaft. The support bearing will need to be pressed off and then new one pressed on to the shaft. The vehicle may not be able to be driven to a repair location without damaging transmission tail shaft. Your best bet here may be to have a mobile mechanic come to you to replace the center support bearing for you.

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Changed the water pump and timing belt now it doesn’t want to start
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