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Rear end shifts left under acceleration

Rear end shifts left under acceleration

I have 2013 Model S 85 and as the subject states, under acceleration and particularly at highway speeds, the rear end of the car shifts to the left.

It'll do it every single time and it snaps back when you decelerate. If you apply the throttle slowly the rear feels like it is slowly moving left, it's a very strange sensation and obviously torque related but I can't figure out what is moving.

I've pulled all the wheels and nothing is loose enough for me to move it, no obvious bends, breaks or faults... Anyone have a clue what to look at?

I have air suspension and it seems healthy and level, if that matters. 118K miles on the clock too.

NKYTA | 17 septembre 2019

Alignment?

rob.james.arias | 17 septembre 2019

I have experienced this on two separate occasions with two separate causes. The first time I had a tire blow, and replaced it with a newer tire. The new tire on the rear caused the car to pull horrifically when accelerating. I moved it to the front and it stopped. I would recommend trying to rotate tires if you are not staggered. The second time it occurred the bushings in the rear end (can't remember which ones) were bad.

Baer | 21 octobre 2019

I also have a 2013 S and am experiencing the same problem. On sudden acceleration the tears shifts to the right. On sudden deceleration it shifts to the left. It started as a subtle shift. Over a few weeks it became significantly worse - horrific is a good word - to the point of danger.

I took it in 8 weeks ago and the service folks tightened a pair of bolts - I forget exactly what they were, but it solved the problem. Now, 8 weeks later it has begun again. I have an appointment in 2 weeks to look at it.