Started to hear strange sounds while driving in 2wd in the front end and around where the driver sits. (grinding, clicking, clunking) It started out intermittent and is becoming progressivly worse in frequency and volume. When i put it in 4wd part time or full......it sounds like a piece of metal is flying around inside of something....VERY loud! VERY alarming, and when back into 2wd this sound continues for a few minutes and then goes back to a less dramatic/slightly different, grinding and clunking sound...just not as bad....is this enough to diagnose the problem to the transfer case? Should i even bother fixing this??!! it has 130,000 miles...and still needs a power steering pump, rack-in-pinion is leaking, front driveline rear boot is broken, front left axel seal is leaking and has a broken motor mount....should i even bother? am i wasting my time and money?