QUOTE (PoMansAWD @ Oct 14 2009, 07:10 PM)
Thing is; Why would you go through the pain and anguish of removing the fill plug to "inspect" the rear diff oil and not just dump/fill it? Normally I'd agree to leave it alone, just like rear diffs were left for decades, but having changed the rear diff oil on some late model truck/truck based vehicles, the rear diff oil can look horrible, as did the debris magnet. My point is; If you're going to do the xfer case, might as well do the rear.
Isn't this part of the drive train?
If I am not mistaken, it should be warrantied for 10 years or 100,000 miles.
I have owned cars in the recent past with well over 100,000 miles and never changed the differential oil, including my 1988 Hyundai Excel with well over 100,000 miles.
This brings to mind a 1976 Oldsmobile Delta 88, Hurst Edition that had with over 200,000 miles and the same gear oil in the rear end.
Just how long do you people actually plan on keeping these vehicles? Forever? Perhaps even longer?
Seriously, quit worrying about things that have no merit, unless you are actually beating the crap out of your Santa Fe. In that case, do what you have to do but chances are, your beat up Santa Fes wont last that long anyway.