About four years ago, I replaced the coupler on my 2003-era Kenmore washer while I was in there replacing a clogged pump. I bought the "heavy duty" coupler with the metal inserts. Thought nothing of it.
Last night, our washer started making some horrible grinding noises. The tub was trying to spin, but wouldn't...the motor was turning, but the tub wasn't spinning. Upon inspection, it appears that the transmission side of the coupler had a keyway that was all egged-out. It was essentially stripped. Okay, no problem, I'll just replace it. Not so fast, chief. Gee, that transmission input shaft looks a little warbled, too. Sure enough...its keyed surfaces are rounded smooth as well.
I jumped on the interwebz to see what to do. Unfortunately, the input shaft is pressed into the transmission...there's really no feasible way for a DIYer to replace it. It's not even sold separately to begin with. So I have to buy a new transmission ($140 on Amazon Prime). I started looking at reviews of the couplers on there as well. There are numerous comments against using the new couplers with the metal inserts...mostly citing stripped motor shafts. There are a few citing stripped transmission shafts as well.
I guess it makes sense when you think about it. The original plastic coupler was the sacrificial lamb...a plastic coupler will never strip a metal shaft. The new "heavy duty" couplers work great...until you get a high load or some tolerance in the keyway built up and it wears together with the shaft and rounds them both.
So apparently the trick here is to use the plastic couplers...and they're getting hard to find. Maybe Whirlpool wasn't selling enough motors or transmissions, and they needed to find a way to drive their replacement parts business to be more profitable...
Last night, our washer started making some horrible grinding noises. The tub was trying to spin, but wouldn't...the motor was turning, but the tub wasn't spinning. Upon inspection, it appears that the transmission side of the coupler had a keyway that was all egged-out. It was essentially stripped. Okay, no problem, I'll just replace it. Not so fast, chief. Gee, that transmission input shaft looks a little warbled, too. Sure enough...its keyed surfaces are rounded smooth as well.
I jumped on the interwebz to see what to do. Unfortunately, the input shaft is pressed into the transmission...there's really no feasible way for a DIYer to replace it. It's not even sold separately to begin with. So I have to buy a new transmission ($140 on Amazon Prime). I started looking at reviews of the couplers on there as well. There are numerous comments against using the new couplers with the metal inserts...mostly citing stripped motor shafts. There are a few citing stripped transmission shafts as well.
I guess it makes sense when you think about it. The original plastic coupler was the sacrificial lamb...a plastic coupler will never strip a metal shaft. The new "heavy duty" couplers work great...until you get a high load or some tolerance in the keyway built up and it wears together with the shaft and rounds them both.
So apparently the trick here is to use the plastic couplers...and they're getting hard to find. Maybe Whirlpool wasn't selling enough motors or transmissions, and they needed to find a way to drive their replacement parts business to be more profitable...