Do I keep my old Kitchenaid extra capacity or keep the new GE GTWP1000

Manual. Looks like the same machine is sold under different brand names. See if you can find yours here.
KitchenAid KAWS750L


kitchenaid washer stops YouTube

Look for a reputable dealer that repairs KitchenAid mixers. It is worth the little extra money to keep it going well. I had a much needed repair 15 years ago...... it was 8 years old then, and it is still in great shape and working superbly!!

Two Clips (about 6" long and held to the motor with 5/16" head screws) hold the motor and pump assembly in place. Another two hold the pump to the motor. To do this job you need not remove pump from motor.

This job is much more easily done if you remove the outer case from the machine. See Link below for service manual:

https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/f7e2147fa98b28cf85257122007475cb/$FILE/L-55.pdf

based on feedback that i received on the forum, i realized that the washer doesn't have a belt (it's a direct drive machine). then, i replaced the motor coupler, which was a lot easier than i thought when i posted this question.

detailed instructions can be found on an excellent post by jsrock516 on fixya.com. even though the washer is labeled 'kitchenaid,' look for whirlpool, top-load washer, tips. then, search for replacing a motor coupler.

jsrock516's instructions look complicated, but they're really just a very detailed, step-by-step guide written so you don't need any pictures. read through them before you start, and then follow each step as needed. great stuff.

Probably a bad clutch attached to the motor.

Because I don't know the Sears or your GE model number I will give you a link to solutions to this problem.
kitchenaid-top-mount-refrigerators/">http://fixitnow.com/wp/2009/05/26/the-permanent-cure-for-repeatedly-freezing-condensate-drains-in-whirlpool-roper-kitchenaid-top-mount-refrigerators/

http://appliancejunk.com/forums/index.php?topic=22.msg46#msg46

http://servicepartstec.blogspot.com/

If this helps you, please rate me, Thanks, Sea Breeze

The KitchenAid is an excellent washing machine and I would recommend keeping it going as long as possible. The most probable cause is a broken motor couple and the cost to repair is around $100

http://tclaundryrepair.com/home

if it keeps filling when unplugged replace fill valve if shuts off ckd pressure switch and hose to switch from tub

check pressure switch hose