I have posted a lot here recently during two major jobs---replaced my clutch and did front end work, and later replaced timing belt. During these repairs, I also cleaned & re-packed my CV boots, changed transmission fluid (manual), and changed tie rod boots. I mention this since it might be relevant to my brand new problem, described below:
I got the thing running again after the timing belt job, and took a victory trip of about 4 hours highway driving today, at the start of a vacation. During the trip I noticed some very minor steering wheel shudder on the interstate. Once I got off the highway and pulled into a gas station, I realized there was a significant vibration/shudder during tight right & left turns at low speeds. Feels like torque bind based on what I've read about it. But, I'm not experienced enough to be sure---perhaps it could be something else.
I did some reading and noticed that (if it's torque bind) it could be my center differential viscous coupling. (I sure hope it isn't!) Relevant to this, I should point out that my transmission fluid was changed recently---but this problem didn't occur until AFTER this long trip. (I've heard/read that in old or poorly maintained cars, changing transmission fluid can cause problems).
I did check my tire pressure to make sure this isn't being caused by low tire pressure. I've got 35 psi on the left, and 30 and 32 on the right side. I imagine this isn't enough to cause torque bind. Could I be wrong?
I know I should have gotten an alignment done after the front end work, but I forgot to get it scheduled before this vacation. I figured it would probably be OK, since I counted threads when I was removing my tie rods and the vehicle isn't "pulling" to one side. I don't know if a slight misalignment could contribute to this.
Also, after my clutch job, I experienced some bearing noise after a few minutes of driving. Eventually I discovered that this can occur if axle nuts are over tightened (this prevents bearings from being able to expand when they heat up). I loosened the nuts a bit and the problem went away. Now I am wondering if today's problem could be the result of the bearings being *much* hotter than they are in driving around town (i.e., 4 hours of driving 75mph). Could it be worth loosening the axle nuts?
Finally, could the steering wheel shudder be related to the torque binding? Or are they probably unrelated problems?
As always, thanks to all the brilliant Subaru experts who have helped me out on this forum. Much obliged :-)