Washer tub won't spin. Belt is slipping. Drum seems frozen.

did it sound loud on spin if it did
check your bearing as they may be worn and need replacing
or your pulley may be damaged

Might be the drive belt slipping on the pulley. The belt that supplies the power from the main motor to the drum sometimes slips at higher speeds and needs the belt tensioner adjusted to tighten the belt. A more expensive reason for the noise is a worn bearing in the main motor.

the drum bearings are shot,you need to get them replaced,if the drum is actually hitting the sides if the tub this could be a broken spider thats on the rear of the inner drum that holds the drum on if this comes loose it can cause serious personal injury

The motor is supossed to walk up the belt to let it slip enough so the pump can run and drain out the water before the drum spins at full speed( that's why it's spring mounted).
Check the pump belt, it should be snug but not tight, you should have some give when you squeeze the belt together, but it should not touch together. Don't use any belt dressing on it, it needs to slip. Make sure the washer is unpluged before you do anything.

If the drive belt is slipping during the agitate and both spin cycles for loaded conditions, I suspect that the drive belt is excessively worn. If it slipped only during a loaded spin cycle, I would have suspected that the sliding motor mount is gummed up and not moving to a belt tighten position during the start of a spin cycle. Since the unit drains with no problem for loaded and unloaded conditions, the pump belt should be OK. Replace the drive belt and clean the dust, gunk, detergent, etc, out of the sliding mount to make sure that it tightens properly when a loaded spin cycle starts. Note that on most models, the drive belt is designed to slip when spin cycles first engage, and they will continue to slip until after the drum has accelerated.

The belt sounds worn out since its slipping. Change it out. Its cheap fix.

The drum brake does just what is sounds like. brakes the drum. For instance when u open the lid during a cycle and everything stops thats the drum engaging and stops the movement of teh drum. If the brake is malfunctioning two things will happen, you open the lid (assuming the safety switch is still good) or the drum will not spin at all.

Sound like it's time to go shopping, sorry

Check tension of the drive belt from the motor to the tub.

May need tightening a little.

there are several drive belts for this model... check here to see if the one you are fitting is the correct one... also,is the tensioner siezed? causing the tension to be too slack therefore allowing the belt to shred at speed?

check here .. http://www.partselect.com/AppliancePartList.aspx?Brand=Admiral&Appliance=Washer&ModelNum=&Type=Belt&MinSize=U&MaxSize=U&Electrical=U&Metal=U&Plastic=U&OneColor=U&PageSize=15&FirstPart=1