Posted similar thread on
JCW forum but i thought i'd give you guys a call.
Took my 03
JCW in to the main dealer for an MOT (running perfect), it passed the MOT fine but as soon as i drove it out the car park it had this new problem, when using engine braking to slow down you'd get to 1200rpm in gears 3/4/5/6 you get a horrible jolt that sometimes even gives the transmission a bit of a wack, it's like you lose the engine brake for a split second and the car takes a lunge forward and then it's fine again slowing down further. Interestingly in 2nd it happens at 2000 rpm why? - took it back to them and got the usual 'we did'nt do anything' line (except scratch the roof
)- they said it could be software fault and needed a re load (which took them 6 days!!!!) and guess what... it's still got the prob. I took it to an independent Mini guy and he re loaded the latest software but the problem is still there, unfortunatley the only other guess he has is it's possibly the Dual Mass Flywheel (i hope not) but he's not 100% convinced and it's an expensive excercise if he's wrong. Gear selection is fine and no noises. Anyone got any ideas?
As the good ones know all the answers like Dave at ThinkMini-Worcester and there are others depending on where you live. 
