Washer wouldn't agitate or spin

First I unplugged the machine from the power outlet. Then, I tipped it on its side and saw that the coupler was completely destroyed - there broken pieces of plastic and rubber all over!
NOTE: I found out later that tipping the machine was a very bad idea - don't do it!

Here's what I did after I got the machine back up right: Remove the housing. Disconnect the wires going to the motor. Remove the pump. (I had to also remove the hoses to get the pump out of the way.) Remove the motor. (It is very heavy, helps to have something holding it up while removing and replacing it.) Finally remove what is left of the old coupler - I used a screwdriver to pry off the pieces. It was difficult to put the new coupler on. This is where I used a hammer and a deep socket to get the parts all the way on. Then I replaced the motor, pump, hoses, and wires.

I indicated that this took 15 - 30 minutes, this is an estimate of how long it would have taken, if I hadn't also decided to clean the machine while I had it open. There was also alot of water that spilled from the hoses when I removed them, I recommend putting down towels or finding a way to catch the water with a bucket or pan.