danthedj

iTrader: (1)

I've been having a weird problem with my GS at speed. When im on the highway doing between 60-80mph it seems like the rear of the car is "wiggling". I cant think of any better word to describe it. The car doesnt feel planted it feels really loose. The car also has a pull to the right (assuming just needs an alignment).

I have read all the prior "shake at 65mph threads" and that doesnt seem to be my problem. I do have a very slight shake in the steering wheel at highway speed along with while braking. My first thought was that one of my rear calipers is seized causing the wiggle and shaking.

HELP?

pardesi

Check the tire rating as well. If the rating is below what is recomended for the car, it will do that. Mine did that cause i ordered below rating snow tires once and had similar issue.

danthedj

iTrader: (1)

Im 99% sure i have the correct rated tires. Im gonna go double check right now but im sure they are right.

danthedj

iTrader: (1)

just looked, 225-55R16. OEM spec.

geeznuts

iTrader: (14)

Look for a bubble on one of your rear tires

Gunnut

One key thing is to torque the wheels to the proper spec. THis took away all the vibration from my 98. Overtorquing is not good.

TruPlaya26

iTrader: (4)

This happened to me not too long ago after I lowered my car. The cause? Too much negative toe on the rear tires, take it to get an alignment and you should be fine.

danthedj

iTrader: (1)

I'm assuming the "bubble" on the rear tires would be visible to the naked eye?


As for overtorqing the wheels, what is the proper lb/ft for the lug nuts?

fenderzig

iTrader: (2)

Are your rear wheels balanced? When rear wheels are unbalanced usually you'll feel a wiggle/shake in your seat....could that be it???

danthedj

iTrader: (1)

Im hoping all it needs is a balance. I just bought the car from a VERY shoddy lexus dealer and they probably never thought to do that.

iloveGS4xx

iTrader: (2)

haha samethig man but i have 19's
FRONTS 245's
REARS 275's

Freaks me out sometime especialy when it pulls to right :CCC

BrentGS

Maybe you have been driving too many BMW's

On stock wheels and suspension my car felt like it was floating and ready to flip at any second, I dunno if that's the same feeling that your getting but wheels and suspension did help greatly.

Vibrating while breaking could be warped rotors.

danthedj

iTrader: (1)

Thanks everyone for the great replies. Im gonna try and get the car in tomorrow for a roadforce balance and hope everything checks out.

As for the wiggle, it doesnt seem like the car is going to flip over. It just seems like your body is wiggling back and forth when driving fast. haha its impossible to describe.

Unfortunately i havent been driving enough BMWs to feel weird in this car. This along with the 2010 RX are the first luxury cars in the family.

Rich23

iTrader: (3)

Speed balancing issues... Get your tires speed balanced and see if you may need a re-alignment.

danthedj

iTrader: (1)

what exactly do you mean by speed balancing? I planned to get them roadforce balanced. Im unsure if those are the same thing, or have the same ultimate outcome.