Tranmission Update SIB 24 06 08 for the 4.8 engine. MUCH SMOOTHER!!!

[CleanIsFast]

Originally Posted by rh71

^ well I was responding to foozed since he's tried everything. If YOU are going in for the first time and know you dont have that particular update, it would probably help to tell them the SIB so they can find it easier and not waste time.

haha sorry. Well Im still at the dealership (free wifi). They said they'll need the truck overnight for the transmission check, so i said f that. I'll have to do it another day when i have more time.

Just doing some brake fluid/oil stuff today

[ad78]

Originally Posted by CleanIsFast

haha sorry. Well Im still at the dealership (free wifi). They said they'll need the truck overnight for the transmission check, so i said f that. I'll have to do it another day when i have more time.

Just doing some brake fluid/oil stuff today

this is true, reprogramming the software is taking so much time.

[jharms]

My wife has this problem on her X5 4.8 2007. She had it into the dealer a few months back and they updated some software. My guess is that it was the update listed here. It was much improved...for a while. Now it's doing the same thing again. We're going to take it back in to verify that it does have this update. Has anyone else had this problem reoccur after this update was done?

I also disagree with a poster a few messages up which said that the problem could be eliminated by gently pushing on the gas pedal. Its when I'm trying to make a smooth and easy start that it jerks. At least on our X5, a tender foot doesn't do the trick.

[mtech8]

Originally Posted by jharms

My wife has this problem on her X5 4.8 2007. She had it into the dealer a few months back and they updated some software. My guess is that it was the update listed here. It was much improved...for a while. Now it's doing the same thing again. We're going to take it back in to verify that it does have this update. Has anyone else had this problem reoccur after this update was done?

I also disagree with a poster a few messages up which said that the problem could be eliminated by gently pushing on the gas pedal. Its when I'm trying to make a smooth and easy start that it jerks. At least on our X5, a tender foot doesn't do the trick.

+1. After the software update, my car seemed to drive smoother (for a while). But lately I've been experiencing the jerks/unsmooth shifts again. I've been trying to pinpoint the cause, but still haven't figured out exactly under what condition it occurs. It's like Russian roulette. I'm never sure when it will just jump out wildly.

I do agree that it tends to happen more when I try to make a smooth start. A smooth start for me is where I gently ease into the gas and progressively add more to speed up. The problem of course is that gently stepping on the gas sometimes just doesn't move the car or moves the car very slowly.

I also notice that the problem seems to occur more when the car is carrying more load. When I'm driving by myself, the acceleration is still not as responsive as the starts in DS mode. There is a lag. But when my wife and kid comes along, the lag is much more evident and the jerks and sudden surges happen more often.

I've driven many, many cars in the past and the only other car whose transmission acted like this was the recently changed model of a Mercedes E320. So disappointed in my X5.

I just wish the car would drive more smoothly like in DS mode, but just shift slightly sooner to the next gear (than rev up higher in DS mode).