I purchased a 97 Cruiser a couple weeks ago and it came with a not so nice vibration. I was under it today and snapped a couple pics. Possible causes are front DS u-joint or center diff mount. Please take a look and tell me what you think. The center diff mounting screw appears like it's not screwed all the way in. I attempted to turn it with no luck. Also the rear u joint of the front DS appears to be broken. What do you all think?