I think you call it something else over in Britain --- basically non-smooth partial engagement of the clutch. I've noticed it getting worse recently, mainly in reverse but also starting off in first gear. In conventional RWD cars I know it can be due to bad motor or transmission mounts, driveline supports, etc. but I'm not very familiar with transaxles. Where should I be looking for the cause of this problem? It's not anything more than an annoyance when backing out of my carport but I know it shouldn't be doing it.