I think my gearbox may be low on oils as it appears a little rough between changes & sometimes appears to momentarily 'coast' (albeit for a split second) without any drive.
The Dipstick appears to be secured in place with a plastic block on top, If I break the seal & check the oil are you still able to drive the car without the dipstick being resealed until you get a new one?

Alan, August 2009