Hey guys.. Wondering if anyone can help me with my ZF problem. The car is a 2006 mk2 bf xr6 turbo and when I'm under WOT in manual shift mode changing 3rd to 4th the gearbox makes a strange shutter and then bangs back into 3rd instead of 4th. Only happens here and there. Gearbox was last service at 105,000km with new heater exchange and the car now has 119,900km. Car is making 340rwkw if that makes any difference. Could it just need a service?? Thanks guys