ch45x7

First off, this forum has been a ton of help so far. Thanks to everyone that's helped me out.

So at the end of last month I picked up my first XJ. It's a '98 classic. Came with a 4.5 Rough Country lift installed, and is on 31" tires.
So here's the list of what I've fixed or had fixed so far.
New exhaust (except manifold) including new o2 sensors
New RE Adjustable Track Bar
New Steering Gear Box
New Front rotors and pads
Alignment done
New extended brake hoses in front and center rear
New 31" General Grabber AT2 tires
New Fuel pump assembly and gas tank straps
New K&N cold air intake
New Serpentine belt

So here are the problems I'm still trying to figure out.
Rumbling/banging sound when going over small bumps, i.e. small pot holes or going over manhole covers etc
This sound comes from front driver side and rear (both sides? kind of hard to pin down while driving)

Slight squeal at idle from serpentine belt. Goes away when driving, comes back at idle. New belt so not adjusted properly? Had my shop throw it in while I was in, so it should be installed correctly.

Grinding/scraping? Noise coming from rear axle. Bearings going? Breaks going? Again it's kind of hard to pin down while driving. It's there when breaking, but also there when just driving only not nearly as noticeable.

Door lock button on driver side doesn't seem to work, but the passenger side one works on all but passenger side rear door. Thoughts?

One of the lights in the dash is out, behind the speedometer mostly. Anyone know what bulb replaces this? Part #?

Anyone know where to get the 3 switches that would control the rear wiper, rear defrost?

Finally, anyone know where to get a replacement decal that says 2wd, 4wd part time, 4wd high, N, 4wd Low? Mine has a crack in it and the light behind it is annoying when I'm driving at night.

Radi

Check the shock mounts and bushings, they'll knock over bumps if they're shot.
Belt is possibly too loose. It needs to be really tight.
Check the rear brakes first, the hardware may have failed.
Bad switch(es) and bad wiring from door to chassis causes a lot of power lock problems.
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