Last weekend I installed a banks monster muffler and pipe. I removed the skid plate, but didnt realize that when I took that off my transfer case was going to drop. I got the new muffler installed and everything jacked back up and bolted back on. But now sometimes when I'm starting off from a stop, also when I start from a stop and turn, I am hearing a noise. I also tried the 4wd and I can move the lever but its like 4 hi and 4 low are blocked and cant pull the lever into those positions. Please help!!