Rear-end wanders at speed Help please

Rusty

With too much toe. You usually see the edge of the tread blocks start to feather.

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kenchan

oscar- u need new tires. you're down to the wear bars.

Robert Yuras

still going with this, or maybe a broken CV

oscargarza88

good news! new tires in the back!

The fronts still look good so im going to hold off for a while.

Still have an alignment due, didnt have time to do it today.
Once i got home after a couple hard corners i realized im at lease 1+ inches from the sidewall so as you guys confirmed way too much camber in the back.

Came to the conclusion of -1.4 camber in the rear with -.03 and go from there.

Seems good but will not know for sure until it rains again.

Until further notice thanks for all the feedback and will report back once i can get a alignment again.

Thanks!

GSS138

RE 760 Sports?

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oscargarza88

Hankook v12 2.
So early update Is he car still feels a bit off. It hasn't rained so haven't tested it fully. Hopefully this plus alignment will fix the issue completelly.

As far as grip they feel a bit more than the stock tires when they were starting to go out. Kind of what I expected for the price. For a dd I think it should be enough dry ad wet grip.

Jordo!

Hmm -- so just tires?

Glad it turned out to be a relatively simple fix

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oscargarza88

Not quite. I'm thinking after I re do my alignment it will be back to normal fingers crossed

Big J

I have the same issues it sounds like with the rear feeling like it wants to go its own direction, esp in rain and on bumps. I got new tires and aligned that helped nothing. I have now bought new rear koni's and that did not help at all either. I'm kinda lost now since i have literally checked everything like 1000 times. Let me know what you come up with and if you decide to go with new shock's I have a basically new set of rear kyb's and rear adjustable koni's i would sell ya.

oscargarza88

so update...:

ITS FIXED!!!

So I had new rear tires replaced and still did not fix the issue even though it did get better. I didnt get around to aligning it yet since my guy was busy this week but i did find the bolt that holds the camber arm in the hub area in the passenger side was loose. Loose like the nut was flush with the end of the screw



Thinking about this being loose doesnt make sense in my head how it would have cause such an issue since i have the SPL camber arms and even if the bolt was loose the movement up and down would have been the same and the way the arm is in place does not allow side to side movement.

Regardless of explanations (which i hope someone can chime in) i no longer get that wandering feeling and the rear following the grooves of the road. Its pouring rain right now and can confidently drive at whatever speed without this issue. It feels like the first day i picked it up.

Unfortunately i cannot explain what the issue was exactly but i did 1:replace the tires and 2: tighten the camber arm bolt that was loose.
Still plan on dialing back the camber but in the meantime very happy with the fact that my car is back to normal, i was worried for a minute there.

For you that said oh its just the camber and don't be scared of the rain, haha it was definitely something more.

Thanks for all the feedback, much appreciated and anyone with further questions please ask.

Thanks!

oscargarza88

this is what the bolt looked like when i found it. quite loose alright.


like i said cant explain how that would affect the handling so much but it did something alright.

jchammond

I'm currently experiencing my Z dancing around at high speeds/worse on 2 lane roads,,,was never an issue till the alignment set my front and rear toe at 0.
i mentioned this earlier to (Rusty) & he told me that i needed some positive toe...i just haven't had time to take it in....drives perfect under 80-but don't push it hard or it will be squirrelly.
Before alignment shop got it,i adjusted my rear camber myself to straighten out the tires more-to make a few passes at the dragstrip.
drove to track and back (120miles) with no issues,,,blasting up to 130,140 at times.
front toe was 0.22L & 0.08R rear was 0.21L & 0.37R a good bit of + toe in rear....their final setting was front 0.01L & 0.04R rear -0.02L & 0.02R
i'm pretty sure the toe is the problem on mine...any inputs are welcome.
BTW,,,,13.1@105mph 1.955 60' base/touring/auto/2011/stock

Merv

I would definately give the shop that did your original alignment sh:t. How could they miss that with your car on a hoist getting dialed in! Pure laziness.

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Merv

I'm no suspension guru or track junky,so I won't comment on that,but I like those numbers for your 1/4 mile!

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jchammond

Had to go underneath to see what was up myself;already adjusted rear camber to more positive before....looked at ecentric bolts for toe & broke out tape measurer.......1/4" wider track width in front of rear wheels compared to backside......marked bolts and took photos of timing marks....loosened & adjusted equal amounts on both sides(tad more on l/r) ending result was 1/8" narrower in front of rear wheels compared to previous 1/4" wider.......test run up to 130...smooth as glass & don't have to hold steering wheel through acceleration...not sure how much positive toe i have in rear...but Z feels like it's old self again..