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S197 Handling Section For everything suspension related, inlcuding brakes, tires, and wheels.

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front end shake...

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Old 02-06-2012, 11:56 PM   #1
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Default front end shake...

Just bought an 05 gt. It has new oe perellis on it. Alignment was not good so I had it aligned. Toe was .33" total, now is set at .1 per side .2 total. I think camera came in at -1.6 and -1.7, don't recall caster but it is all in spec.

Still shakes like a beast on the highway, gets much worse in turns on the highway, especially long right handers.

I've inspected everything and can't find anything loose/worn. It does have the strut mount rattle, but as I understand it that is pretty much just an anoying sound.

Car is all stock. It is high mileage, 136k. Unknown service history. Don't worry, got it CHEAP, was expecting a few issues.

Do I just start throwing parts at it or what?
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Old 02-06-2012, 11:59 PM   #2
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Camera= camber.

Forgot to mention I rotated the tires front to rear and initially it helped a bit on straight sections, but it is just as bad in curves. Was thinking tire balance, but it being so terrible in curves makes me think It's a part failure..
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Old 02-06-2012, 11:59 PM   #3
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Have you checked the tread on the tires? OE tires and 136K miles are not a combination I would want to see, you'd be past the wear bars lol.
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Old 02-07-2012, 12:01 AM   #4
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They are brand new. But they are the original p zero nero a/s's.

I also checked for a bent rim by sight and they "appear" straight to me.
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Old 02-07-2012, 12:13 AM   #5
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Hmm, did they balance the wheels at the same time they were aligned? Maybe an incorrect alignment... Have the tie-rods and ball joints checked as well- they are common causes of steering wheel shake.
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Old 02-07-2012, 05:56 AM   #6
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How many miles on the tires while the alignment was off? You may have a bad wear pattern in the tire itself.

Just this weekend I started on replacing front suspension components on my car (195,000+ miles) and when I took the tires off I noticed that one sat tilted because of how it was worn - when I finished with the wheel bearings and put it back together I swapped tires and the pull was now going the other way.

With new tires the car tracks straight and no more wobble on the highway (still need to finish up with new ball joints and tie rods, but that is next weekend)
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Old 02-07-2012, 08:04 AM   #7
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Originally Posted by ummduh View Post
They are brand new. But they are the original p zero nero a/s's.

I also checked for a bent rim by sight and they "appear" straight to me.
Hey man, is the shaking an "up and down" feeling?...or wobbly?

When you checked the rims, did you look to see if the rims wobbled when you spun them, or did you see if they raised up and down?

If your alignment is corrected, I'd definitely throw the wheels up on a balancer next.
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Old 02-07-2012, 09:24 AM   #8
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How many miles on the tires while the alignment was off? You may have a bad wear pattern in the tire itself.

Just this weekend I started on replacing front suspension components on my car (195,000+ miles) and when I took the tires off I noticed that one sat tilted because of how it was worn - when I finished with the wheel bearings and put it back together I swapped tires and the pull was now going the other way.

With new tires the car tracks straight and no more wobble on the highway (still need to finish up with new ball joints and tie rods, but that is next weekend)
I don't know, I've only had the car 2 weeks now. They appear (hermes that word again) perfect by sight. I already rotated front to back, I'll try left to right next.

There is 1 I need to replace due to a staple in the sidewalk, but It's now in the rear and the pressure is correct.
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Old 02-07-2012, 09:27 AM   #9
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Hey man, is the shaking an "up and down" feeling?...or wobbly?

When you checked the rims, did you look to see if the rims wobbled when you spun them, or did you see if they raised up and down?

If your alignment is corrected, I'd definitely throw the wheels up on a balancer next.
Yea I sighted them in both directions. They appear tru by sight. Id say the shake is and up and down feeling more than a side to side feeling.

As much as i want to, I really don't have the cash to throw everything at the front end right now.
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Old 02-07-2012, 10:22 AM   #10
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Yea I sighted them in both directions. They appear tru by sight. Id say the shake is and up and down feeling more than a side to side feeling.

As much as i want to, I really don't have the cash to throw everything at the front end right now.
Do you have a local do-it-yourself hobby shop? At places like that, there is usually a crew on hand that will help you with the basics. If you find a shop, see if they have a balancing machine and go throw them up there and see how it turns out. Should only cost a couple dolares. You might have a bad balance.

Do you feel the shake just in the steering wheel, or do you feel it in the seat or on the floor under your feet? If you bello out an "aaaahhhhhhh" while driving, is your voice "shaking"?
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Old 02-07-2012, 10:23 AM   #11
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Oh, and welcome to the forums.
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Old 02-07-2012, 10:38 AM   #12
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Oh, and welcome to the forums.
Thanks!


I may know a guy I can use his balancer... Been a while since I called him up though!
I did spend a couple summers as a teen as a tire guy for Goodyear. I got the basics down. This is just my first mustang, I've always had "almost mustang"s.. 87 cougar xr7, and 3 different mn12s. They've all been a LOT different mechanically from this s197 platform. LOL.
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Old 02-08-2012, 07:56 PM   #13
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At that many miles I would definitely check the front wheel bearing assembly. I know this is a weak part and racers change them out often. Jack up the front of the car and put you hands at 12 and 6 o'clock on the outside of the tire and push/pull to see if you have any play. I had one go out before 50,000 miles.
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Old 02-09-2012, 01:31 PM   #14
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Bearings, rotors, bent rim on the INSIDE. Bent suspension components. Uneven tires.
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Old 02-09-2012, 01:41 PM   #15
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Check the wheel bearings and ball joints. Ford revised the ball joints mid'08 and beefed them up a bit. The 05-early 08's had the older style which were prone to wearing out fairly quickly. An easy swap is the FRPP Aka GT500 front lower control arms.

I wouldn't bother trying to replace just the ball joint. They are press fit and you don't save much by buying just the joint instead of the entire arm with the joint.
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Old 02-11-2012, 02:18 AM   #16
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Check the wheel bearings and ball joints. Ford revised the ball joints mid'08 and beefed them up a bit. The 05-early 08's had the older style which were prone to wearing out fairly quickly. An easy swap is the FRPP Aka GT500 front lower control arms.

I wouldn't bother trying to replace just the ball joint. They are press fit and you don't save much by buying just the joint instead of the entire arm with the joint.
I'm headed to a buddy's shop in the morning to balance the tires and check for trueness and runout. I'll ask his opinion of the bearings while I am there if he's not slammed. I've checked everything and it all seems tight. but now that bearings are mentioned I do seem to notice a little bit of bearing noise, but being my first mustang I'm not honestly sure if it is or not. I understand these aren't luxury cars, just can't decide if It's bearings or road noise.

the car really drives tight going down the road It's just long high speed sweeping turns that it all goes bad. it doesn't jiggle, shake, float, or anything weird around town other than the mad strut mount clanking.

if my guy says everything is fine I'm just going to start throwing the gt500 parts at it starting with lca's and strut mounts and go from there.
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Old 02-11-2012, 07:40 AM   #17
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  1. Have a RoadForce balance done. It'll pickup what normal spin balancers won't.
  2. Are the wheels OE? Aftermarket wheels require the removal of the wheel stud clips installed to help on the assembly line. They prevent the aftermarket wheels from sitting flush against the rotor. Their existence on your car can be hit or miss.
  3. 136k miles and you have the OE tires? Damn!
  4. Worn out suspension components can cause vibrations.
Good luck!
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Old 02-11-2012, 02:28 PM   #18
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Well, found the cause, almost certainly. 3 of my tires are like freakin oval. Belts must be separating. I couldn't see it looking from the side on the car, but on the balancer it's BAD. The machine was calling for 4+oz inside and out on 3 of them. Only 1 was good, my RF tire.

So I'm trying to decide what decently priced tires to put on it now. Not going back with these perelli's.. But also can't afford to drop $175+ per tire right now either.
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Old 02-15-2012, 01:15 AM   #19
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I've been pretty happy with the GoodYear Eagle GTs I've been running. Set of 4 mounted, etc tends to run about $600. If you know a guy, you might get out a little cheaper. As a plus, they seem to run 'wide' for the size. They certainly look to be wider than the PZeros, despite the same nominal size.
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Old 02-17-2012, 08:46 AM   #20
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I smacked a curb pretty good when the car was fairly new and bent/broke an inner tie rod. Caused the exact problem you're describing. Like was stated previously, lift the front end and push pull on the tires at the 12 oclock and 6 oclock positions, then at the 9 and 3 oclock. If you have play at 12/6 it's likely ball joint or control arm issue/s. Play at 9/3 is tie rod or steering rack issue. The wheels should move as the rack hydraulics extend but should be tight. Any slack or rattle and you have a problem.

EDIT: I see you found the cause. yeah, tire belt separation would be a problem too!
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Old 02-17-2012, 08:46 AM
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