The last service was a simple inspection and frame maintenance with no clutch problem or maintenance. Belt looks fine and is sitting cleanly in all the pulleys and the drive shaft.

Rode it again today and it is more of a clutch grinding/ slipping noise than a high pitch belt squeal.

Dealer said it was normal to get a squeal from the clutch holding the mower stationary on slopes.
There has been no noises whatsoever, even on the steepest slopes, prior to last week. Always had heaps of torque and punch going up slopes.

Leads me to think something has got onto the forward drive plates or perhaps glazed the plate