Re: 142 Stability at high speed
"Russ" <email@example.com> wrote:
>>Ball joints, tie rods, idler arm, wheel bearings--all need to be checked.
>I did the test where you jack up the car and wiggle the wheel and it
>I pulled on the tie rods they are tight.
>I'm not sure how to test the idler arm or the wheel bearings.
>>Wheels true and not flat spotted?
>No Flat spots nice and smooth
>>Tires well balanced on a high speed spin balance machine?
>Yes I watched the guy balance the tires when I had them put on.
With the car on the ground, lie under the front end with a strong
light and have someone repeatedly turn the steering wheel, somewhat
rapidly, back and forth just to the point of resistance. Have them
slowly increase the amount of force and violence with which they are
turning the wheel. You can then watch, listen, and feel for problems
like loose ball joints and play in the steering box and such.
After that, put the car on stands and have safety blocks under the
frame. With the wheels in the air have someone place a long lever
under the front tire and repeatedly lift and release to raise and
lower the wheel. This should help isolate loose bushings, ball joints,
Rotate the tires front to rear and see if that helps.
It doesn't take much to induce a wobble or instability at speed. What
feels tight to your hands whicle the dcar is sitting on the ground can
be an entirely different matter at high speed. Additionally, the
problem can be cumulative- that is, a tiny play in a ball joint, and a
tiny looseness in wheel bearings, and a little slop in the steering
box can all add up to the problem.
Randy & \ \/ /alerie's
'93 960 Estate