I am worried about recent problems with the gearbox in my 2007 4.2 SC. Mileage is 76,500, owned since September last year. In the last couple of weeks there have been half a dozen occasions when the car will not pull away, it just revs. Also, when approaching a roundabout recently there was a 'crunch' as if I started pulling away just as the box changed down to first and then it had to change up to second if that makes sense! (this has only happened once). The 'trigger' on the gear selector appears to have failed, i.e. you can push it from D to N without depressing the trigger - could it be this, i.e. it's slipping into neutral? The car drives fine the rest of the time, although thinking about it the gearchange has felt a bit strange. Having read other threads on here about similar problems I am concerned that the gearbox may be on it's way out. Any advice/comments welcome. Thanks.