[Shotimes] Re: Inner Tie Rods - Redux

[Leigh Smith]

Alan;

If I am reading you description right, you are getting 8 thousandths 
movement at the rotor top & bottom. Doesn't really sound too bad, I'd 
check the other side and see if there is a major difference. Wheel 
bearings should have some small amount of wobble. The rear of my 89 has 
the manually adjustable kind and I am sure they wobble at least that 
much. I am sure there is a spec for it somewhere. FYI my tie rod ends 
wobbled 60-100 thousandths when I changed them out! Front to back though.

Lee


Alan Fanning wrote:
> With the wheel removed from the front driver's side, I've poked and prodded
> a bit more to try to isolate where the wobble about the horizontal axis of
> the associated steering knuckle is occuring. Having the wheel/tire combo
> installed sort of ruins the view of things, so I installed short spacers
> over the wheel studs and tightened things up with several lug nuts. This
> allows me to shake the brake rotor without incurring relative motion between
> the rotor and hub. To monitor displacement of the rotor, I installed a dial
> indicator with a mag base on the strut body, pointed at 12 o'clock on the
> rotor. 
> 
> What I find is that the rotor and hub assembly seem to be moving relative to
> the knuckle. If I put my finger between the LCA and the back side of the
> rotor, I can actually feel a slight differential motion between the two. At
> the ~6" radius of the rotor, I get a total deflection of about .008 inch, or
> call it ~.020 total at the lip of the rim (if it were mounted).
> 
> 
> So, I guess this means the wheel bearing is the culprit, not the LCA (too
> bas, as I have a spare LCA). But there is one thing still bothering me: why
> does the motion only occur about the horizontal axis? Maybe the caliper and
> pads are preventing motion in the other direction under the limited force
> I'm applying? Any other ideas?
> 
>     Alan
> 
> PS  Thanks to Russ M for his assistance in puzzling this out.
> 
> 
> Most telling seems to be that, when attempting to rotate the grasping at the
> 12 o'clock and 6 o'clock positions,  I can ceel relative motion between the
> plus measured the displacement at the OD of my BAER rotor (with the rotorl
> offsome input from Russ, I've isolated the wobble in my left front wheel to
> being as follows:
> 
> o   not the ball joint (prying between LCA and strut clamp boss results in
> no apparent relative motion)
> 
> o   not the LCA-to-frame bushing (that would take a lot more force to
> effect, I think; plus if I put my finger between the, and I can actually
> feel  effect the 
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