Hi all Took My 620R to Snetterton Thursday just gone, which is the first time I've driven it hard and at all really since purchasing it back in November where she's sat on trickle charge in garage until this trackday. First problem I noticed was engine miss firing at higher revs which seemed to clear and sort itself out as day went on. But more worryingly was the vibration coming from somewhere near my backside when approaching 100 MPH and above. Did jack rear end up to have look around, only thing I could see was small weep of Diff oil coming from near side drive shaft entry point and LSD Aluminum casing was very hot but guess/hope this is fairly normal? Oil leak from Diff never got worse throughout the day or even made mark/drip on tarmac where it was parked while not on track. Anyone have ideas on what could be cause of vibration would be much appreciated. My own theories are out of balance propshaft or problem with LSD? Thanks Steve
