Actually, brushless motors were never used by Hotpoint until the introduction of the WF840 and WF860.
The WMA63, WMA66 and WMA76 had a specific brush motor fitted along with a third PCB module called a DC Chopper board. The DC Chopper highly refined the power supply to the motor so that it operated quietly at lower speeds and more smoothly overall. I actually owned a WMA76 for about 6 months and I really liked it but I needed the money more so I sold it on because no matter how quiet or flashy it was I'd rather have an older machine any day.
PS, no mention of brushless motors in the official service manuals either.
James