My 2002 4x4 explorer wont move

if the tail shaft spins , but dose not move points to broken axle, other wise transmission or clutch fault.

I'm not a mechanic guru but be sure, if you have no oil in transmission, your system is definitively damaged.
Fill the oil but, I guess, it's too late, damage is done.
If still won't move, tow it to your repair service, probablbly you'll have to spend some good money repairing it.

Does your drive shft spin and not the wheels?

if its jatco box check power and grounds to the transmission control module locate lh a post check for dtcs logged fluid loss and last but not least has a drive shaft popped out of mesh very poor gearbox allways giving problems

sounds like you have a busted drive shaft or a bust spigot shaft going into your gear box. Easiest way to check on this is to jack up the front of the vehicle and spin the wheels. If the drive shafts move then they are fine and you have a busted spigot shaft. The only way to replace this shaft is to drop the gear box and replace it.

Yes based on this you may have a problem in the transfer case or a broken output shaft from the transmission, tear it down and inspect it.

linkage bolt loose. most likely on transmission linkage plate on the transmission shaft. on the transmission

Pinion gear is out. You will have to have car towed to a reliable auto center, they will go through the system.
It may be quite expensive.

It sounds like you broke a Constant Velocity joint (CV Joint). The pop was probably the joint breaking. When you put it in gear it's just spinning. Think of one of your hands as the transmission. Hold a pencil that would be the CV Joint(s) and axle, and use the other hand to hold the other end of the pencil. That's the front hub (part that makes the wheel turn). So you have ...hand, pencil...hand = trans, axle... wheel. If you hold the pencil firmly with both hands, and spin the pencil with one, both hands still move.

If the pencil breaks...the one not spinning does nothing.

So...The transmission is trying to make the van go, but the cv joint is broken, so the wheels aren't spinning. When you put the van in park, the transmission doesn't know the vans not moving. Therefore it's making the same noise as if you put the van in park while driving. If you must start the van and put it in gear to see if the driver's or passenger's axle is just spinning. Shut the van off, wait a minute for the axle shaft to stop spinning, and then put it in park.

The starter must also be removed and the 4 torque convertor bolts need to be removed, after that only the shift linkage remains and out it comes.