X5 4.6 5hp24 transmission jerks, when car comes to complete stop. Possible solution.

[SlickGT1]

Damn Phil, every time you post something like this, it makes my head hurt. I just wish you were in the states. You'd be getting a transmission from all of these cars once a week.

[nafania]

Totally agrees with SlickGT1. You do have a lot of knowledge about those automatic transmissions. Here, in my country, i told to all my friends and my mechanic that i am talking to a guy from UK. We are all follow your thoughts.

Just look at me and see what we have to go through when someone unknowledgeable fixes your car - its been almost a month and i spent so far 2000$ and still my car is not fixed. My valve body is getting rebuilt and i think they will charge around 500$. Hopefully it will be the end and soon i will enjoy my car since it is almost summer time.

Once again Thank You Phil for all your replies.

[Sergei-e]

Hello everyone,
In my X5, 2001, 4.4l I have experienced a similar "jerking" at the car's nearly complete stop issue for a few days. It was as if something "kicks in" inside he transmission at nearly complete stop following with a spike of the fuel consumption gauge from nearly zero to up to 12-14 l/km and then back to zero.
Today the transmission finally gave up when I was driving uphill at approx. 60-70 km/h (without paying any attention I could not tell for sure whether it was down-shifting at that moment or not). A loud snapping shot was followed by high pitch grinding noise and high increase in the engine RPM. The vehicle came to a complete stop and any attempts to put the lever in reverse or drive position were accommodated by the the same loud high pitch grinding noise without any movement of the vehicle. Even in Park position the transmission has lost its function and the vehicle would start rolling back downhill as soon as I was releasing the brake pedal . I had to tow the vehicle back home on the top of a flat bed track (thanks to CAA for a 160km trip) and planning on pulling out the transmission for repair.
PRPhil,
You are highly knowledgeable expert in transmissions and helped a lot of people with your valuable advices. Do you think this type of the problem may have its root cause in malfunctioning of the control unit (some valve had failed causing engagement of two gears at the same time) and I should consider rebuilding the valve block, too?
I very appreciate you help and your opinion of an expert.
Thank you.

[JCL]

THe park pawl that holds the vehicle from rolling is separate from the drive gears. So if it doesn't drive or hold park, I would look at the transfer case and driveline and not just the transmission.

[J.Belknap]

Originally Posted by RRPhil

This is, of course, by no means geeky in any way

Phil that's fucking awesome.

Thanks as always for the good info mate! Cheers!

[Sergei-e]

JCL,
Thank you for your input. For sure I will check the transfer case.
Do you think it may be not a transmission problem at all?

[JCL]

Originally Posted by Sergei-e

JCL,
Thank you for your input. For sure I will check the transfer case.
Do you think it may be not a transmission problem at all?

Correct, I think it is more likely to be in the transfer case or driveline.

[Sergei-e]

JCL,
Thank you for the excellent remote troubleshooting! The problem was exactly where you have expected it to be - the front drive shaft has span inside the spline hub of the transfer case levelling the spline teeth in both. I guess this was making that scary grinding noise.
Could you suggest anything as the best course of fixing? The drive shaft is very expensive - $877.75 Genuine BMW Part from Pelican parts. Are there any aftermarket options available and worth to consider? What would you suggest to do with the mating component in the transfer case? I guess I still have to pull the transmission out to get to those top bolts holding the transfer case attached to the transmission?
Thank you for your help.

[JCL]

The front driveshaft yoke is a known issue. It doesn't appear to engage enough, as it isn't long enough. Do a search and you will find threads on this. Those threads have the steps involved in changing the yoke.

There have been fixes documented involving a machined yoke that is longer, one poster here was supplying them. Do a search on racemalibu. I haven't done one myself.

Edit: here is one thread. Look for other threads where racemalibu has posted

http://www.xoutpost.com/bmw-sav-foru...er-case-3.html

Here is another

http://www.xoutpost.com/bmw-sav-foru...-slipping.html

[Sergei-e]

Thank you JCL,

I will move to that thread.