Hi guys tried a search but no luck, just had new tyres fitted and now when under heavy load the quad rather than spin the wheels it tries to grip and the gear lever will jump out of its gear either from Low to Drive or from Drive to neutral. It even jumped out whilst holding the lever forward in Low position it makes a grating noise like you would expect in a gearbox.

 

have you adjusted the clutch yet? checked differential fluid for shaVINGS?

 

OOps forgot to mention its the 500 hydrostatic and just had recent service by reputable company.
thanks again
jmc