04 4.4i tranny issue question

[2004_BMWX5_4.4i]

I had this problem twice. After a half mile of driving it would go away.
It went away after a fluid and filter change each time.
I think the darn automatic transmissions just consume more fluid than they should. Serviced mine in December before a trip from NC to OH and it was fine. Still running smooth.


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[Brandon002]

When I first bought mine I had a similar issue. When rolling through a stop, not making a complete stop and then accelerating. The car almost felt like I was neutral dropping it. It would rev up as if it were in neutral, then slam and take off.

I took it to an indy, had them drop the pan, replace the filter and gasket and then flush it out with new fluid. Been flawless ever since.

[roym01]

Same with me. Used to happen once in a while, but not once in the last 3 weeks since I've had the fluid and filter changed, and I've rolled thru many stops just to check.

[AC2717]

Well here is the update Just left service a week ago:
Needed a new Alt -a Diode was bad (thank god not water cooled), needed oil separators on the valve covers
front sway bar links
oil change
Tranny fluid change (3rd one in a year - jus because prior owner did not really maintain as he said)
two wiper pumps
and a couple of minor items.
OHm'ed the grounds because there were not tranny faults only dash/electric faults for the failsafe mode
Drove it for a week ran fine, all of a sudden the transfault hits on the highway while, merging, while moving from 2nd to 3rd gear. WTF!!!!!!!!!!
brought it back this time it was a tranny fault, found the fan was not fully lugged in so was hoping it was just a slight overheat. so corrected that and cleared the fault

driving away, get a few miles from the shop this morning - transfault comes. I pull over sit, turn back on, start to drive pulls the fault right away again and pops the check engine light on.

I think it is time for a tranny????
Or does anyone think it might just be the mech-tronics unit
Thoughts on what to do??? Ideas who to get one from???

I am pulling my hair out, and I do not know if it is worth doing, and then if just do mech-tronics and that does not fix it. my very reputable Indy thinks that just do the whole thing. Only have 134,000 on it