Interesting... according to the above 2003-2004 DIscovery II service manual:
But even more suprising:
Never would have thought of that one.
I would venture to guess this goes for other model years as well?

 

In all cars the SRS is supposed to be replaced every 10 years along with the sensors behind the bumper.
The airbags can degrade with age and not deploy properly, the senors can corrode and not function properly.
Of course no one does this as it is very expensive and honestly I highly doubt anyone actually knows about it.
The cost of replacement would total out most cars that are that old.
Thats why insurance companies almost always total any car that the bags were deployed in no matter how minor the damage.

 

Now we all have the info, thank you.

 

I replace my diff oil every other oil change, but my truck sees water a few times a year.

 

If you can change the fluid in diffs and transfer case and tranny - you'll be better off than just running until failure. Wading is one issue, and the vent system can become clogged, which will let condensation build up. And when vent lines are open, the fluids evaporate more than they would in a sealed can. So you have an open container of gear lube exposed to the elements. Will the fluid in that container in five years of open exposure be equal to new fluid?

So I'd change 'em if you could. On some schedule that is more frequent than the dealer publications suggest. After all, they just care if it lasts past warranty.

 

I'm getting materials together and was just tying to figure out if Dino gear oil will do the job, 85w140

 

The question isn't "will it do the job," but rather "which job will it do?"

If you aren't going to be towing, or rock crawling, or having extended service intervals, or don't live where in can be super cold, or with mountains, then...yes, it'll do the job.

If you're doing any of the above, I'd recommend a synthetic 75w140.

Just my 2 cents.

 

Mostl diffs come from the factory with dino lube, 80w-90 (saves gas).
I use 85w-140 dino lube, I tow trailers, it gets cold here (below zero) and it works just fine.
Would a full syn do a better job of lubricating the diffs? No.
Would it last longer? Yes.
Do you need to select the correct lubricant for the application? Yes.
Are you going to change the gear oil once a year? Go cheap.
Are you driving around the world? Go full syn.

 

Thanks! I will be changing at least once a year if not more (depending on swimming) so Dino will do!

 

Valvoline durablend looks like a nice candidate as its also a syn blend.