On putting the transmission into D or R, a couple of seconds later the
car jerks slightly. The handbook says to wait for it before moving and
I assumed it was it going into gear. However I discovered the other day
that the car will move forward (or back) almost instantaneously D or R
is selected, but you still get that jerk 1-2 secs later even after the
car is moving.
So I was curious about that anyway, but more seriously I had it in P or
N (forget which) at a slow traffic light and was a bit late noticing it
change, so I hurried into D and pressed the go pedal moderately, which
if you've driven a 540 you will know is something like being shoved
quite gently by a large elephant. The car took off but 1-2 seconds
later there was a massive jerk, and a sound almost like a bang.
It seems likely this is the same thing as the slight jerk when the car
is at rest or creeping, but magnified by speed/acceleration. The
question is, what is it? Is it right? Fair enough if you are supposed
to wait for the 'jerk' before moving off, and I should have left it in D
anyway, but surely the Steptronic is supposed to protect the
transmission from damage.
1998 E39 540iA. I had the ATF changed last week although I'm still
concerned about only being able to change half of it because of the