?????
Thread Starter
1st Gear Member
Joined: Dec 2005
Posts: 88
From:
?????
When mycar is at a stand still and I turn the wheels the body will flex. If I turn the steering wheel to the right the body will flex towards the left, if I turn the steering wheel to the left the body will go right. Now I know that the car might move a little, but this motion seems to bemore ( I mean not normal). I took my car in to the stealership and they told me that it was due to the bigerwheels/tires, but my car was doing thiseven with the stock rims/tires. My question is is this normal? Does anyone els have this problem?
2nd Gear Member
Joined: Oct 2007
Posts: 179
From: Oregon
RE: ?????
I seriously doubt the body is flexing. The Mustang body is more rigid than most, even the 'vert.
What I bet you're seeing is perfectly normal and everyone's car does it, but most just don't notice it. Its mostly an illusion.
2 reasons-
Google front end alignment, specifically caster and steering axis inclination.
When you turn the wheel, the tires have to sort of roll up onto their sidewalls a bit due to caster. This creates a lifting motion.
When you turn your wheels, the right side suspension bushings take a load differently than the left side, creating some torque flex in the bushings. This is created/exaggerated by the steering axis inclination being different one side from the other.
You don't see any of this when you're moving, the tires rolling allow some slip to prevent the suspension loading up. The effect is most noticeable when your foot is on the brake, the tires can move to releave the stresses. The wider the tire the more the effect is exagerated.
Try it on a 4x4 with huge tires, the effect is Really big!
What I bet you're seeing is perfectly normal and everyone's car does it, but most just don't notice it. Its mostly an illusion.
2 reasons-
Google front end alignment, specifically caster and steering axis inclination.
When you turn the wheel, the tires have to sort of roll up onto their sidewalls a bit due to caster. This creates a lifting motion.
When you turn your wheels, the right side suspension bushings take a load differently than the left side, creating some torque flex in the bushings. This is created/exaggerated by the steering axis inclination being different one side from the other.
You don't see any of this when you're moving, the tires rolling allow some slip to prevent the suspension loading up. The effect is most noticeable when your foot is on the brake, the tires can move to releave the stresses. The wider the tire the more the effect is exagerated.
Try it on a 4x4 with huge tires, the effect is Really big!
Cut & Paste Expert
Joined: May 2007
Posts: 13,322
From: NW Arkansas
RE: ?????
ORIGINAL: YellowFlame
What I bet you're seeing is perfectly normal and everyone's car does it, but most just don't notice it. Its mostly an illusion.
Google front end alignment, specifically caster and steering axis inclination.
When you turn the wheel, the tires have to sort of roll up onto their sidewalls a bit due to caster. This creates a lifting motion.
When you turn your wheels, the right side suspension bushings take a load differently than the left side, creating some torque flex in the bushings. This is created/exaggerated by the steering axis inclination being different one side from the other.
You don't see any of this when you're moving, the tires rolling allow some slip to prevent the suspension loading up. The effect is most noticeable when your foot is on the brake, the tires can move to releave the stresses. The wider the tire the more the effect is exagerated.
Try it on a 4x4 with huge tires, the effect is Really big!
What I bet you're seeing is perfectly normal and everyone's car does it, but most just don't notice it. Its mostly an illusion.
Google front end alignment, specifically caster and steering axis inclination.
When you turn the wheel, the tires have to sort of roll up onto their sidewalls a bit due to caster. This creates a lifting motion.
When you turn your wheels, the right side suspension bushings take a load differently than the left side, creating some torque flex in the bushings. This is created/exaggerated by the steering axis inclination being different one side from the other.
You don't see any of this when you're moving, the tires rolling allow some slip to prevent the suspension loading up. The effect is most noticeable when your foot is on the brake, the tires can move to releave the stresses. The wider the tire the more the effect is exagerated.
Try it on a 4x4 with huge tires, the effect is Really big!
Camber and Caster is causing your front end to move
when you turn your wheels from lock to lock at zero speed.