???

There is no load on the drivetrain when in N. You select either R or D, and the transmission puts a load on the drivetrain. You should feel something when this happens.

Do you feel something abnormal? It's difficult to say. You should visit a mechanic or talk to a friend that knows about these things. Just from what you said, I don't understand what you think the problem is. I suppose the problem for me is that I cannot judge what "violent," means.

 

It happens when shifting from N to D or from N to R (when the transmission engages). It engages violently, feels like something hit me from behind. I feel the problem occurs when the transmission is hot. After having the car cool down it goes back to normal.

 

I can't speak specifically about the BMW transmission, but on some other cars, your exact symptoms result from one of the solenoids getting "sticky." The cure on those cars is to replace the assembly of four or five solenoids. I think that on the BMWs, it may be possible to replace individual solenoids.

 

Thanks. I was thinking if the fluid is low and try filling it up. I had a change of fluid and filter about a year ago (15k Km's).

 

Bump, any ideas?

 

Hi, have you manage to solve the problem with your car?

I have the same similar problem. My car does not gives a violent jerk, just gives me 2 jerks when engaging.

 

Bad rear diff bushing.

 

My car does the same when I go from D to R or from R to D is like a little bang from the bottom rear it happens every time

 

Have you checked your prop shaft? Do you have a rubber coupling?

 

A bad bushing would make the car sink or rise while brake is pressed and gear engaged.
Violent jerk is the transmission.

 

How's your idle speed?

 

First off... how often and why are you deliberately in neutral?

 

I assume you are one of those auto drivers who sits with their foot on the brake pedal at stop signs. Not everyone does that. Not particularly good practice.

 

Do you know what happens when you slip the auto transmission from drive to neutral?

 

On topic..

The car going into gear real hard is a sign that the transmission is on its way out. The bands or clutch packs have worn almost to their useable limit. Next step from here is limp mode.

 

Not necessarily. Maybe a fluid replacement to start with? Hydro fluid can deteriorate or become air saturated affecting servo function thus affecting band pressure. It has been many years since I had an auto transmissision and I recall a similar problem. It was on a 3L V6 Ford Granada. On that particular box you could adjust the bands by means of an adjustment screw at the bottom of the housing. All you had to do was tighten it up to a spec torque and back it off half a turn. That sorted it out for me on that occasion. The converter can cause jerky responses as well. I would look at fluids first before writing it off.

 

Syncros


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Why put it in neutral? If the light takes a long time, it's easier on the leg, plus the driveline and brake systems are unloaded. If only I could deactivate the shiftlock, so it would shift back to D without pressing the brake!

 

Perhaps the fact that you go to neutral at every stop sign and red light is what ****ed up your transmission. I unfortunately have an auto 2002 and at nearly 200k my transmission is both extremely and surprisingly smooth.

 

The one thing that fecks up auto transmissions is aggressive driving. Period. It fecks up the brake bands and once they start slipping its game over.

 

Could be one of your cam shaft position sensors. I just replaced my intake one and it made shifting from reverse,drive,park etc smoother and faster. I had a stored code but no light ever came up on the dash

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I'm with JJR on this one. I'm confused about whether you have a manual or an auto. If you have an auto, it really is bad practice to shift into neutral all the time, and I wouldn't be surprised if it accelerated the demise of your transmission. If you have a manual, then good for you. It is smart to pull the car into neutral when coming to or at a stop. This relieves the throw out bearing from doing unnecessary work.

As for your noise/jerk, jack up the rear of your car and inspect items in this order; (1) Rear differential bushing (2) Driveshaft guibo/flexdisc. Report back. If either of these items get bad enough. They can turn a slight bump into a loud thud or jerk. It all depends on their condition. Sure it could be your trans, but why start there when it takes maybe 10 minutes to check these items?