Car squirely when I punch it at speed

[artsci]

This is new. When I'm driving the car over about 50mph and punch it it pulls to the left as if there is some problem in the drive train. I've never experienced this before.

Any ideas about what it might be?

Probably need to get it to Service, and soon.

 

[jerry33]

First check tire pressures. Next alignment. There are other possibilities, but those are the two most common.

 

[artsci]

Tire pressure are spot on and I had it aligned a few weeks ago, so that's probably not it.

 

[hmmm]

Any noise(s)?

Not sure this can help, but I had a case of --> What's that noise?

 

[Carl]

I had this on my first MS (RWD). In my case, loose connection between motor and axle. Just a screw to be tightened. Note: car would pull to the left upon acceleration but also pull to the right upon deceleration.

 

[rdr1rx]

My E60 V10 BMW M5 did this (violently) when the rear PS2s (running Dinan-spec 295/30/19 on Dinan forged wheels) were worn to 4/32". Alignment and pressures spot-on. New PS2s solved the issue, good for (only) a short-lived 7,000 miles. My S75 squirmed and pulled just a little once the rears hit 3/32". New tires (21" ContiSilents) at 25,300 miles solved the issue. How's your rear treadwear?

 

[SageBrush]

Nothing wrong with being a squire

 

[sdorn]

Nothing wrong with being a squire

Yeah, when I saw the thread title I was wondering what squirely behavior the car was exhibiting. Turns out they apparently dart left when you punch them. Good to know.

 

[PeterHG]

Are you RWD or AWD? On my test drive, I found the RWD car squirrely--not pulling to the left necessarily, just kind of skittish overall. So I bought the AWD.

 

[LoL Rick]

Had this happen on a Mercedes years ago and it drove me crazy. Turned out to be a bad bushing in one of the rear suspension control arms.

 

[iwannam3]

The last thing worked on is usually the cause, the "alignment" may have left a bolt loose after adjusting the suspension.

 

[artsci]

I had this on my first MS (RWD). In my case, loose connection between motor and axle. Just a screw to be tightened. Note: car would pull to the left upon acceleration but also pull to the right upon deceleration.

Those are exactly my symptoms. Thanks!

 

[artsci]

My E60 V10 BMW M5 did this (violently) when the rear PS2s (running Dinan-spec 295/30/19 on Dinan forged wheels) were worn to 4/32". Alignment and pressures spot-on. New PS2s solved the issue, good for (only) a short-lived 7,000 miles. My S75 squirmed and pulled just a little once the rears hit 3/32". New tires (21" ContiSilents) at 25,300 miles solved the issue. How's your rear treadwear?

Rear tire tread wear is like new.

 

[artsci]

Fixed the problem with an alignment.