Hey there -
I just replaced the drive coupler unit on my old Model 80 washer - the old one had disintegrated and the repair was easy and went well, or so I thought.
Tested it with an empty tub - everything sounded and smelled fine. Threw in a 1/2 load of towels and it worked great, except I heard a 'thunk' sound when the cycle was transitioning from wash to rinse. At this point I started to smell a little bit of a rubber smell but I had chalked that up to little bits of the old coupler getting into the motor housing and burning off as it was heating up. I had vacuumed out the motor housing of all the rubber dust I could before reassembly, so there really wasn't much if any rubber dust left over.
The rest of the wash was uneventful, so I threw in a second larger load and the same thunk occurred during transition from wash to rinse. The smell was still there but otherwise everything was fine. Load finishes, so I throw in one more 1/2 load.
This time I stuck around to hear the noise during the transition and it was as loud as the other two times, but during the spin cycle I detected a VERY strong burning smell so I shut down the machine and unplugged it from the wall. I removed the cabinet and started sniffing around the various parts as best as I could. The motor was still hot but not really smelly at all - the pump had a bit of the burning smell to it but nothing strong enough to suggest it was the culprit.
So - is it my transmission? At this point I am ready to throw in the towel if it is an expensive repair - the washer was bought in 1999 and has been absolutely trouble-free since last week when the coupler issue surfaced.
Your advice is greatly appreciated!
Motor Coupling Part # 285753A