Rest assured an oil change won't hurt, but is not going to cure the Hum.. Let me know once your tired of it.

 

I've heard it's almost always bearings that cause the noises.

 

As long as she can drive it, its OK for now maybe in the spring, I have a parts vehicle but there's no way for me to tell if it hums

Just curious what the cost is for the bearings to rebuild it?

From what I can see in the drain hole no pitting or rust on the ring gear, I have definitely seen bad rears from water before this does not look bad just poor quality and bad design huh?

 

Yes, then wear on the gears. It's rust. You'll find a few pictures here. https://www.facebook.com/DifferentialPartsUS

 

So weather or not I change the bearings now makes no difference,the gears will still need replacing?

This is one of those things that makes me dislike land rover poor quality for such a high price vehicle

 

Drop me a PM if you get to the stage where you'd like to repair it. The gears and components I know are not LR, but better than the OE gears, so they will last longer, run quieter, and so on.

I've been suggesting for many years to change the diff oils every 30k or so to prolong the life as long as possible. Once they are noisy, they will be noisy regardless of bearings, oil changes, etc.

 

OK , sucks a rover with 50k already has a bad rear

 

I believe it's the passage of time more than miles, which allows the rust to take hold. Drop me a PM anytime.

 

Yes, rust seems to come with time, be itexternal on the body or inside stuff such as in the cooling system, engine block or gear bits.

In the case of differential internals, rust is most likely the result of internal moisture so that means your breather lines/breather valves must be in good shape; also that the oil be changed at least every once and awhile to get rid of the moisture buildup.

 

Ive got about 1500 miles with Royal Purple in both Diffs and the Transfer case. So far so good. It seems a tad but nosier but otherwise seems to be doing fine. I plan on changing the fluids every other oil change so the LR fluids were a bit out of my price range with that frequency.