High Speed Wobble??? =(

[thatmountainguy]

So I drove over to the west side from Spokane for Christmas,

And the drive went great until I hit the east side of Snoqualamie pass, and all of a sudden at 72ish mph the rear end started wobbling back and forth rapidly. Probably 6 inches either way. I got slowed down and to the side of the road, I had all lugs, tires are new and in good shape. Limped my way to the next exit, anything over 45 mph and the car started wagging.

I pulled the tires off, and looked through the rear end, everything looked fine, struts and springs are worn, axles are in good shape, tires didn't have any lumps or bubbles. Sway bar is in good shape. I put the wheels back on to make it to the next exit (that had a gas station) and it was fine. No issues the rest of the way, and back to Spokane. :shocked:

Now for the fun part... WHY??? bad bushings? Old Shocks? Crooked tires that may have been solved by puttin em back on right?

I'm lookin to get KYB GR2's and prolly some Eibach springs to replace the originals, are there bushing sets that I could buy somewhere?? I think I'm dealing with a big ol combo of old parts that caused this...

Thanks ya'll!

[ImprezaObsNick]

So I drove over to the west side from Spokane for Christmas,

And the drive went great until I hit the east side of Snoqualamie pass, and all of a sudden at 72ish mph the rear end started wobbling back and forth rapidly.

Thanks ya'll!

This could have been because of a loose lug nut. If you were doing 72 and the rear end was bobbling back and forth that bad and it isn't after you took them off and put them back on the shop you took your car to might have not put the lugs on the right PSI. <- i know that's a run on sentence I'm drunk bare with me. Always check your lugs after getting your car from a shop. Never trust them. :thumbsup: Other then that make sure your tires are balanced properly. Did you hit snow at all by the way? or ice? or any mud in your rims? because if you get anything in your rims it can throw off the balance of your tire at those speeds. Not to long ago i had my rims packed of snow and it took 30 minutes for it all to melt and my steering to be normal again. I have no clue if this helped you but have a good one man! Drive safe. :headbang:

[Jgizzy]

I was thinking the same thing ^^^ I'm not sure if you encountered snow/slush/mud or anything like that, but if you get any of that stuck on the front of your wheel or in the back dish of your wheel, it can cause semi-violent shaking. I had this problem just the other night with our Infiniti I30.

If it happens again, I would have a spotter watch the car as it does some symptom-inducing movements and watch for anything weird or noticeable movement of the wheels or suspension parts. I never heard of worn shocks (not blown) causing that type of symptom though. Inspect your rear springs and make sure one didn't break at any coil length.

[wolfman79]

I get that all the time after ice racing or just being up in the mountains when the roads are snowy or slushy. It doesn't take a whole lot of snow to throw your tire balance off at highway speed, takes even less ice. When you pulled your wheels off you undoubtedly dislodged any buildup on the wheel(s) and that is what returned your balance to spec. A good trick that we learned from ice racing is to wax your wheels, not just the face but in the hoop too. Pam or other cooking spray works good in a pinch also.

And if you can't trust your shop to torque your wheels properly then you need a new shop. They make these magic things called torque sticks and a torque wrench(ratchet). There is no excuse why any vehicle should leave a shop with improperly torqued wheels.

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[thatmountainguy]

I sorta figured it may have been a loose lug... There wasn't any snow in the rims, and the rest of the trip went well. Thanks for the thoughts guys!

:)

[AWD>FWD]

Other than that, make sure your rear subframe bolts are present and torqued properly.

[thatmountainguy]

I could'nt see your whole post for some reason wolfman79, but thats a great idea! Thanks! What type of wax do you use? ski/snowboard?

[tsidreams]

I say jack up the rear and give the wheels a good push and pull. Try to feel where the play is coming from.

It reminds me of when my control arm bushings went bad on my talon. Anything over 75 felt like the car was fish taling down the highway.

GL

[wolfman79]

We just use old school turtle wax. Pretty much any type should work, curious how a ski wax would work. Might have to try that this season.

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[eage8]

We just use old school turtle wax. Pretty much any type should work, curious how a ski wax would work. Might have to try that this season.

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+1 I've heard of people using WD-40... but I imagine wax or cooking spray work fine too.

[ImprezaObsNick]

Wax?? Why didn't I ever think of that! Thank you for that! I will remember!