Product review (4 stars): washer stopping mid-cycle with SUD error
The replacement motor worked but its day 2 and if it goes past 3 mo with no issues, I'll update this review and make it 5 stars.  Couple of things to notice - it looks like a generic not an OEM like others noticed, doesn't include the screws to connect the motor to the drain/hose or the rubber gasket (to prevent water leaking from the coupling)  - so if you are do it yourselfer, save the previous motor, the screws and the gasket. The motor arrived by USPS 2 day priority mail which was a nice touch - thanks.

Here is the learning I went thru and hope it can help someone in a similar predicament (with a Kenmore Elite HE3t). My issue started with water in the drum at the end of cycle and quickly turned into washer stopping mid cycle with door locked and SUD error on display. I tried resetting and restarting a few times but soon the washer stopped spinning with door locked an load of laundry inside.

First challenge - unlock the door, remove the laundry and drain the dirty water. I disconnect washer and put some 2x4 sections under the washer to tilt it backwards for easy access to lower panel (2 star screws (secure drill bits not part of regular drill bit sets).  Once the front lower panel is off, you feel your way behind the door lock  till you can feel a little protrusion (about 0.5") that is almost exactly behind where the lock is. It is not possible to see or target except for touchy-feely way. Once you pull on it downwards the door unlocks.  It helps to have washer tilted so water can stay back in the drum rather than gushing out (you may want a lot rags/towels and a bucket handy). In HE3t there is a wiring harness that obstructs reaching back to motor and drain easily.  If you remove the screws connecting green ground wires to the frame (star security bits) and move the tabs left or right (not up or down) they'll come off the frame.  The wiring harness will still be connected but will allow for you to easily get to the motor.  If you remove the single screw (star bit) at the base holding the motor-hose to the body, it'll come free. HE3T model has drain plug that can come in handy for draining the water into a shallow pan while connected. I removed the rubber hose and the coin trap and washed it (sometimes there is blockage that can prevent drainage causing the error and you may not need to change the motor - there are youtube videos showing how to do this).  In my case, the hose and the coin trap were quite clean which left motor or the pressure switch as the likely culprits.

I read in the reviews here about the pressure switch and the black hose  it is connected to or the clogged drain pipe as other potential culprits and wanted to see if I should clean/inspect them before ordering the motor. I opened the top panel (3 star bit screws in the back) but did not see the white plastic part some one mentioned. You may want to remove the drain hose and see if it is clogged as well. Since my coin trap and rubber hose under the drum was pretty clean, I concluded that drain hose likely may be the same way (clean).  Instead of removing the hose and inspecting I just took a chance by ordering the motor first.  The new motor was quite easy to install (rubber gasket and 3 screws from the old motor to connect new motor to the drain plus coupling, and retracing the steps to put the wiring harness back).  I then tested the drain/spin cycle to see if there were any leaks and the drain motor was doing its job before putting the bottom panel back and removing the 2x4 to get the washer even.

If you are contemplating buying a motor, you probably are somewhat of a fixer and done some research.  I tend to call repair men mostly for such issues except for I am increasingly finding having to stay home for 4 hr window and waiting for them to show us a tricky trade-off to tinkering myself.  I want to thank the community of people on Amazon and youtube who take the time to share tips and make the time to explain "how to" which have been invaluable time savers (not to mention $$ on a call - last time I paid $200 for someone to replace a creaky hinge on the oven door - for 1 min 12 sec of his valuable time).