Bmw 325i 7803 said:
I've come to the conclusion that this occurs most severely when:
1) It is below 35 outside, the colder the greater the chance of it being replicated with "severity"
2) You use the gas pedal when backing out of your driveway, especially if the distance exceeds 100 feet.
3) The car has to then accelerate up an incline, especially with the front wheels in a turned position.
4) You tend to give a generous amount of gas upon shifting into D...
So my question is, since the so called "slipping" only occurs in these extreme conditions, although it has during the summer made a slight bump feeling on the occasion ( same start off conditions minus the heavy foot on the accelerator and low temperature) how am I supposed to go about bringing this issue to the dealer, since in the dealers warm garage and if just taking off in D from a parked position I can almost 100% guarantee it wont happen.... Since it is afterall a very mild of case of the sliptronic ( it has never slipped on driving on city streets etc).. And also would anyone know if it has something to do with production date mine was from Jan 2003 in Munich Germany?
Well, I am one of the "founders" of the Sliptronic club and have had 2 sliptronic transmissions to experiment with.
I agree that lower temps exasperate the problem, but it occurs at any temperature. It happened to me this summer in 60 degree weather. It routinely happens when backing up 25 - 35 feet. It does not have to accelerate up an incline, mine happens on flat areas with the wheels straight.
What I can also absolutely state is that the longer you let the car sit, the more guranteed and severe it will be. Due to the snow and crap on the roads, my car is now being used only once a week or less. In the past 3 weeks it sat for at least 7 days in the garage at about 50 degrees. When it was driven, it slipped for 7 seconds or so each time.
I had to give the dealer very explicit directions to reproduce it. The first 2 times, they didn't do what I said and it didn't occur. Tell them:
1. Park it forward into a parking space (outdoors).
2. Let it sit for at least 3 days.
3. Start the car.
4. Put it in reverse and backup 40 to 50 feet.
5. Shift to drive and step on the gas.
If you have experienced the problem, then if you follow the above procedure, it seems to be very reproduceable.
Personally, I think that if the problem is not fixed, the initial lack of lubrication and then the sudden surge will cause damage to the transmission internals over a period of time.