Wobbly back end after lowering
A few months ago I lowered my 9G (2007 SE) Galant with Eibach Pro springs and brand new struts (Monroe). It dropped the car pretty good in the back (about 2in from wheel well) and a bit in the front (4-5in? from wheel well). I didn't do an alignment.
The car drove fine afterwards. I even took a 1600mi trip to MT (windey roads at high speeds (90mph+)) and the car felt better then ever, but recently (about 2000 miles after lowering) I've noticed a few times the back end gets a really scary wobbling feeling. I can't explain it extremely well, but it's similar to if I hit a patch of ice going really fast only at the back end. Even though it's only for a few seconds at the time it's pretty scary, like I don't have a lot of control and it feels like the car is going to flip or something. I can't pinpoint exactly when it happens. I drive about 20 miles each way to work and it's happened a handful of times to various degrees on different parts of the road at different speeds. It's always only during traveling at 50mph + though.
I'm worried I didn't tighten everything down enough or something, but I'm a pretty big stickler of heavy tightening and spent all day doing the strut/spring job. I've relooked under the car and nothing feels loose at least to a hands touch. Should I break out my tools and try to retighten?
The online reading I've done sounds like I either need to get an alignment done, or my axels aren't handling the drop. Anyone have any experience with this? I'm going to a dealership across the street tomorrow to hopefully get an alignment done and 2 new tires. I'll see if that fixes it, but if not I wanted to ask around on here for any advice.
Here's some pictures, I'll try to upload better ones up close as someone on here earlier mentioned they couldn't get a good picture of the drop from these.
http://i.imgur.com/V4jhPvd.jpg
http://i.imgur.com/9HJKejA.jpg