WTW5100SQ0 Whirlpool Washer - Overview

The job looked intimidating but turned out to be very easy.
First take off the water pump by removing the two clips that hold it in place. Place a shallow pan under the pump to catch the water that is in the pump and hoses. Open the hose clamps with a pair of pliers or channel locks (better) and slide the hoses off of the water pump.
The motor comes off next. Unplug the electrical connector from the motor and two wires from the capacitor. Remove the two screws holding the clamps in place and then pop off the two clamps. You will need to hold up the motor with one hand while you remove the clamps or it will fall to the floor once the clamps are removed.
One piece of the coupling assemble will be attached to the motor and the other will be attached to the gearcase drive shaft. If you want to clean up the mess created by the shredded rubber center piece of the coupling assembly you will have to take off the motor mounting plate. It is held on by two bolts and removing it makes installing the coupling easier but probably not necessary.
Push the back half of the coupling on to the gearcase drive shaft until the shaft is flush with the face of the coupling. Install the new rubber center piece on to the coupling then re-install the motor mounting plate. Install the other half of the coupling on to the motor shaft and lift the motor up to the coupling. You have to rotate the motor shaft by spinning the fan blades until the coupling lines up so you can slide it into the other half of the coupling. Then just reattach the motor, connectors and water pump in the reverse order of disassembly.

The hardest part of this job was pulling the machine away from the wall so the hoses could be disconnected and the machine flipped onto it's back. Putting the machine on it's back does two things. It drains the water left in the bottom of the tub so it won't pour out onto the motor when the old pump is removed, and gives the necessary access to the pump. Once the machine is on it's back you remove the hose clamps with a pair of pliers and disconnect the hoses. The pump is secured to the motor with a pair of spring steel retaining clips which are easily popped off by hand. Once the clips are removed, the pump is in your hand. Put the new pump in place, replace the retaining clips and hoses, and you're done. This has to have been the easiest repair I've ever done. I wish cleaning gutters was this easy.

researched potential causes, found cluch dust under the washer and determined that it wouldn't engage because clutch was too worn. ordered the assembly, removed agitator from inside the tub as it is connected to the gear shaft, turned washer on it's back for access to motor, unattached the direct drive water pump from the motor drive, unbolted the 3 gearcase mounting bolts and took the entire gearcase, shaft, motor, etc... together, out from under the washtub. the clutch slides off the gearshaft with a little fidgeting and the new assembly is easily installed where the previous was. put everything back together... then... spin spin! worked perfectly