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-   -   4.8is wiggly rear end (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/110099-4-8is-wiggly-rear-end.html)

SlickGT1 04-09-2019 06:53 PM

Son of a bitch. Was at friends shop today visiting. Got my car on lift, put a stand under the perch. And guess what? My pass upper control arm is loose. Guess I need to shop as well.

StephenVA 04-10-2019 08:19 AM

These things burn through suspension bits pretty fast. BMW engineering made a big fat vehicle handle and ride extremely well using lots of suspension points with joints and bushings. Side effect is we chew up tires and parts!

The arms in front are 40K and the rears seem to be 60K based on my experience. A lot less mileage based on driver's right foot and the roads we all seem to hit now days.....

andrewwynn 04-10-2019 01:06 PM

That happened to the same guy I mentioned above. One part shifted so much he suddenly had to steer like 8° to the side to drive straight


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twinspool 04-10-2019 04:21 PM

Did you adjust the springs on the BC coilovers by chance? If you did, then you ruined the pre-load which could cause this body sway... you will have to redo the pre-load which is fairly easy...

PS. I didn't read all the comments so if this was already said, +1

DesertTech 04-12-2019 06:54 PM

Quote:

Originally Posted by twinspool (Post 1159633)
Did you adjust the springs on the BC coilovers by chance? If you did, then you ruined the pre-load which could cause this body sway... you will have to redo the pre-load which is fairly easy...

PS. I didn't read all the comments so if this was already said, +1


I did recently adjust them but it has been happening for about the last 2-3 months before the adjustments. What makes me think its the alignment rather than the spring rates being uneven is that when the car goes over slippery thin patches of black ice the back will step out and try to align itself and then swing back in when there is grip again. Just ordered an 8 piece rear suspension kit and will install before the next (and hopefully final) alignment.

DesertTech 04-12-2019 06:57 PM

Quote:

Originally Posted by StephenVA (Post 1159611)
These things burn through suspension bits pretty fast. BMW engineering made a big fat vehicle handle and ride extremely well using lots of suspension points with joints and bushings. Side effect is we chew up tires and parts!

The arms in front are 40K and the rears seem to be 60K based on my experience. A lot less mileage based on driver's right foot and the roads we all seem to hit now days.....

Do you know which bushings exactly fail and cause the common camber issue? I hear some say its ball joints, some say swing arm bushings, and some say upper arm bushings. I love the way it handles but wow the suspension is definitely a weak point it seems! The 315 rears don't help at all too I'm sure!!!

SlickGT1 04-12-2019 07:32 PM

Quote:

Originally Posted by DesertTech (Post 1159847)
Do you know which bushings exactly fail and cause the common camber issue? I hear some say its ball joints, some say swing arm bushings, and some say upper arm bushings. I love the way it handles but wow the suspension is definitely a weak point it seems! The 315 rears don't help at all too I'm sure!!!

It’s a 5k lb suv that handles like a 3 series. Yea suspension will get murdered. But it still lasts 100k miles. So that should say something.

andrewwynn 04-12-2019 08:43 PM

I have seen it be any of the above.

I bought the tool for the ball joint but didn't buy the bushing until I do the test for wobble.

StephenVA 04-14-2019 03:26 PM

Rear ball joints are most of the issues reported. Extreme clunking, one side tire wear, unable to bring camber into specs AFTER replacing all the normal suspension parts, all of theses point to alternate issues.
Start with the normal stuff first

LVR 04-14-2019 08:28 PM

:iagree:


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