Atf6000es Replaced door lock took out the motor and spins freely no drag, checking brushes and relay next. However before it stopped spinning i heard a loud pop. where would that pop noise come from?

SOURCE: Door Lock Clicks/Makes noises Washer does not agitate/spin

Sounds like very worn motor brushes to me, as its trying to turn the drum but has'nt the power needed to maintain any momentum,and the blinking door light is because of the bad cotact from brushes to motor.About £20 for a set of brushes or get an engineer to fit new brushes,but get a price first.

SOURCE: whirlpool super capacity Lsq9549lw0 has trouble spinning on its own.

If the washer does fine thru the agitation cycle (the washing), that means the motor is OK and the coupler is OK.  It would not agitate unless both are OK.  (and don't listen if anyone tells you the lid switch is bad -- machine would not fill & go thru wash cyle). The spin is another matter.  There is a separate tube for spinning the basket.  There is a drive  block at top of the tube (that sometimes fails)  and there is a separate cluch mechanism below, under the tub.  Those places is where you should look.

SOURCE: Fisher Paykel GWL10US Washer won't spin

It looks like it has to be the control module.
You need to replace it .
It will cost you around $200 .

SOURCE: Fisher Paykel GWL10US Washer won't spin

Look at my issue on "eco smart won't drain, smells hot". You could have same issue and your motor just hasn't burned up yet.

SOURCE: buzzing - will not spin or drain water

This noise is probably the pump trying to start but will most likely be obstructed.Drain the machine manually by lowering the drain hose into a bucket or bowl and then remove blockage.