here are a few threads from earlier days:

http://vehicross.info/forums/showthr...ht=ring+pinion

http://vehicross.info/forums/showthr...ht=ring+pinion

http://vehicross.info/forums/showthr...ht=ring+pinion

http://vehicross.info/forums/showthr...ht=ring+pinion

U-joints will cause the clunking type sounds, espically when going form drive to reverse. Gears, make the whining sound