At 177K on my 2014 Forester getting ready to put my 2nd replacement LCA on the front left. Replacing the Mevotech that has a lifetime warranty (not qualified for warranty because I am not a Certified pro tech... read the fine print) It only lasted 4 years. Knock on wood my right front replacement is a Moog and has held up so far. Same exact symptom, jutter at 68 - 72 mph on the expressway with the slightest turn of the wheel. In the left (fast) lane its worse as the highway is pitched to cause rain to flow off the highway to the left. In the far right lane it acts up much less as that lane is pitched the opposite direction. Your struggle to get the ball joint seated into the knuckle can be far lessened if you start with the new LCA by putting the ball joint into the knuckle first and tightening the pinch bolt tight enough so it will not drop out but not to spec so you can still manipulate the LCA, then insert the link to the tab and work your way toward the center of the vehicle putting it back together as man handling and getting your bolts through the other two connection points\bushings is generally easier than the ball joint that wants to move under pressure and possibly start to go in cock-eyed. Also at least in the rust belt here in the Chicagoland area be careful when removing the pinch bolt from the knuckle. I had the pinch bolt snap off on one side and had to replace the entire knuckle, wheel bearings etc. NOT the result I wanted.
I get a similar sound when driving over 60, it goes away if I drive on the left lane, probably because the incline is relieving the pressure on whatever is causing it. I checked the wheels and there's no play. Any Idea ?
