Hoping someone can shed some light on a very recent problem I have started suffering with my GT Sport 170 TDI... Whilst driving on the motorway with the car fully warmed up (at least 10-20 miles driven) the gearbox has taken to jumping out of 6th gear on the over-run. There's no noise/bang/knock or other clue. First I know is that I either notice the revs dropping or I put my foot back on the throttle and I get engine revs and no drive. It goes back into gear with no drama or fuss and drives perfectly normal under throttle.
Any ideas what the problem might be?
Glynn