Shimmy
 

My 03 x5 4.4i is starting the shimmy also. I usually drive in Sport mode. Cleared the driving memory so we shall see on the road tomorrow. I have a sick feeling that it's a tranny issue. Please post up if you have any info.

In accessory for 10 sec, then off, then starting is to reset the throttle response

4.4i 2000 same story pretty intermittent,5 days of shuddering,per say,2 weeks without.
Tranny was rebuilt,the issue came back the very first day....
did anybody try changing the MAF?
I am trying to get one OE ,so far didn't have spare change for it...

I have the same issue still no fix. Changing MAF does not help. Can anybody provide some info on this problem. Thanks

I reset the tranny programing and it seems to be a little better. Doesn't shudder as much or as bad as before. Maybe a programing issue, especially since some have had thier tranny replaced or rebuilt and the issue returned immediatley. I've always noticed if you give it more gas or let off the gas a little it stops immediatly, just as driving in sport/manual mode it doesn't do it at all. But still do not know what it it causing it..:dunno:

Same issue with my 03 4.4i Sport too. More noticeable when engine is warm and with more weight in car. Have tried MAF cleaning and coolant flush but does not help. Only band-aid that works is putting it in Sport or go heavier on the pedal. Does anyone know which years the transmission software upgrade is available for and if it solves the problem?

My 2002 4.4 does EXACTLY what the op posted. I am going in today (for the third time) to get this resolved.

Here is my theory. ......

We all understand why wheels need balanced. And we all understand when they are not, they can get shakey, jerky, vibrate, (what ever yiu wanna call it) ONLY AT CERTIN SPEEDS.
This is called "harmonic balance" the natural vibrations of an object spinning. NOW, our motors spin, and also have this same issue. At some rpm's our motor is very "harmonically balanced" and at other rpm's..... not so much.

I believe that if the motor mounts were worn out, loose, ext... That this could give us this "shake" at a certin rpm.

Two reasons. Those of use who have this issue... It's IDENTICAL to one another.
PLUS have you notice that when this issue is happening, you can REV right past it? Typicly when a motor is running rough, and you add throttle, the motor struggles to "REV out of it".

With this issue, I can REV out at any speed, slowly, quick or what ever.

I will be with the Teck when my ride is up on the lift. This problem is over TODAY!!!!!!

Jordo, just curious what was done on the first two attempts? I like your theory but have a feeling that there will be a fourth time in on the near horizon. Good luck, let us know how it goes...

You are right... My theory was proved to be wrong. What I did find is that it is most def trany issue.
The issue is line pressure is just a touch too low at that RPM/speed/gear. This is causing the hyd pressure on the clutch to insufficient and the clutchs are "kicking back".

Teck told me a trany flush may fix this.
Or a trany update may fix it but he stressed no guaranty.
Othe possibility is the hyd valve block is scored and the valve body is hanging up causing what we feel.

So to recap.... Could be fixed by a flush and a program upgrade total of $250.

This is back up by issue instantly going away by switching into sport mode.

At post 17 by Jordo I was thinking exactly what he said at post 19 , pressure issues so Jordo here is some candy for you to get your teeth into , enjoy .
My visit at ZF Dortmund for Gearbox maintenance.(very, very long!) HUGH RESULT!!
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http://e38.org/transfund1.pdf
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