OK - Unit #2 - unknown condition.
pic #1 - The first sign of trouble - notice the brake ratcheting plate and friction discs are loose and hanging. All the ball bearings are gone as well as one of the friction discs.
#2 This unit has a ground line bolted to the underside of the motor casing that the other did not. Was the other unit missing it or just a different design??
#3 With the top case removed I see an immediate issue - there are two teeth missing from the shaft and one of them is rusted into the main gear.
