Ive just added another Rover to the stable, My wife LOVES my 04 FFRR and has just about taken it away from me so enough is enough. Yesterday we purchased a 2008 RR sport Supercharged, 83K, one owner dealer maintained, with records. man we are going to be fighting over that thing. Now to my question, on our way home we noticed a faint hi pitch noise, it kind of reminded me of the same drive train noise that a school bus makes, it would only do this while the pedal was pressed, if you let off it stopped, my wife said it sounded like it was coming from behind her, (I cant hear too well I guess its all that 80's hair band music)wasn't loud just annoying, is this normal for the sport? I was thinking about replacing ALL of the fluids, I know rover has a special diff fluid but how many have used Mobile or royal purple etc in there electronic rear diff for an extended period of time and have you seen any improvements/problems? I run Mobile1 full syn in my 04 RR. Do you guys think it will help any or is this a sign of a pinion or wheel bearing going out? what do I need to look for while under the truck besides fluid level in the diff? is there any way to check the play? how hard is it to pull the rear diff in these rigs. Im an old school shade tree mechanic but these new fangled electromagnetic flux capacitor rear diffs are a little intimidating, but if it needs any work Im going to be the one working on it, I figure hell, I can learn how to repair it myself and if I screw the thing up once or twice I will still be way ahead of what the LR dealer would want to charge. Also the front suspension creeks, sounds like front right but Ive read hundreds of posts about squeeking/creeking front suspension, I think Ill get some silicon spray and lube it up.