2006 Cadillac SRX V8 AWD 102k miles.
Parts Replaced (not necessarily all because of the below issues, but all issues have existed both before and after all repairs that I know of):
- Both front struts (AC Delco)
- Both front stabilizer end links (I believe AC Delco)
- Both front lower control arm assemblies (at 83k miles, before I took ownership)
- Axle Seals (also at 83k miles, before I took ownership)
- Left hand engine mount (driver's side, primary mount)
- Both front hub/bearing assemblies (Timken)
- Both front rotors (Raybestos)
- Both front brake pads (Wagner)
- All 4 tires (Yokohama, I'm not sure if problems were as noticeable beforehand as these were installed not long after I took ownership of the car and lots has been done, plus it could have gotten worse in the meantime while I've been getting to know the car)
- All 4 tires rebalanced again
- Computerized 4-Wheel Alignment (including rear adjust)
Problem(s) (may or may not be related to eachother):
- Car tracks straight if you let go of the wheel, but steering wheel has a constant faint shimmy back/forth at ~40mph, and around 60mph becomes much more noticeable (you can visibly watch it oscillate and feel it in your hand)
- The shimmy is not just in the wheel, you can also feel it in the seat, in the floorboard - the whole car seems slightly unsettled
- Going over bumps/small potholes at low speeds, there is a faint "pop" noise (jounce/creak, hard to describe) from the front, not loud but noticeable. Noises are less common and pronounced if both wheels go over the bump etc at the same time.
- At higher speeds it is louder, and becomes more of a rattle. Also when hitting a small pothole for example on the highway, the rattle sound happens, but also feels like the wheel gets a little play/motion/slack for a half-second, then back to fully engaged/responsive. It still works, but feels like it loses grip for a second.
- It does NOT make any weird noises (popping, clicking, grinding) when turning the wheels, either stopped or at speed. Only when going over bumps.
- We have also bounced on the front end about as hard as possible by hand, but it doesn't make any noises at all when sitting still. No pops, creaks, anything.
Any thoughts? At this point most of the front end is new...it seems to me if the noise is from both sides, it must be something that the sides have in common...maybe something with the sway bar, or axle, or somesuch?
Have owned the car since beginning of January this year, at just under 90k miles. Clean title, but did have a front end collision before I got it. Everything has been repaired to my knowledge though.
Thanks in advance!