Product review (5 stars): so far so good
this is my 2nd coupler order... it took a moment to find a seller who'd send what i'd specifically purchased...a substitute part left me feeling unsure and  my washer disassembled for an extra week...i'm not a technician, so i wasn't comfortable w substitute parts, esp. when i didn't agree to purchase one.  the most difficult part of changing the coupler was taking things apart and fearing that i'd break something or not know where to return things...there are fabulously instructive videos on youtube that lead you step by step...from beginning to end... an appliance parts co. has one of the clearest and most precise videos of all...the camera enlarges, gets up close and underneath, you see everything...but of course my washer model had a piece attached , not shown in any video... that prevented me from completely removing my motor...BUT i'm proud to say that with extra eyeglasses and the right tools...i was able remove the said part and attach all the new parts...i re-connected everything: pump, hoses and electrical stuff... plugged granny whirlpool up and took her for a "spin".  (couldn't resist).  so far, so good.  she's spinnin' beautifully. there's no banging, knocking or rocking.  i proud of myself.  i saved about $129.

 Note: some folks say this all plastic part isn't good; but my original all plastic lasted 16 yrs.  some say that this one breaks after several washes.  we'll see... some pros say that the newer coupler w metal in the center will cause more serious damage to motor, etc., if it is damaged... that's why i chose the plastic...  some say that careful installation is key in all cases... i feel confident enough now that i could re-install if need be...hope not, but glad i know how...i'll keep you posted.  but, i repeat, so far so good.