Reanimation

So I changed my rear differential oil today, I used a large suction tube thingy that work really well, as you can see the old oil was a nice Guinness color but I didn't see any particles in it so happy I changed it anyway
.

xsever

I did the same on my car with 129,000 Km and the fluid came out black like that.

It feels good when you change fluids with such wear especially for the differential fluid which barely anyone changes.

Reanimation

I'm wondering if the MPG will get better slightly.

sailorben

Reanimation, you're in the UK aren't you? Where did you get the diff oil from and what did it cost you?

The diff oil is the only fluid I have yet to change.

mis3

Did you see any change after the fluid change; handling, gas mileage, etc?

Reanimation

It was £24.99 eBay. It only needs about 1.3 liters.

http://www.ebay.co.uk/itm/1721729737...%3AMEBIDX%3AIT

Plus this was amazing for refilling or extracting the fluid.

http://www.ebay.co.uk/itm/1519127520...%3AMEBIDX%3AIT

Reanimation

Maybe a tiny bit smoother of the line, a longer drive is needed to see if the mpg is different. I'll get back on that.

mbnz230

i need to change this and the transmission fluid just like you did. i am at 89K miles.

xsever

When I changed it on mine, I could not notice anything. Just a placebo effect that a new fluid inside that diff should make "gears and things" turn better.

I did however experience smoother shifts after I changed the transmission fluid on my 722.6.

mis3

I agree on the ATF change. I am doing this again next week.
I went to the dealership to buy ATF yesterday and the price dropped, from $23CAN to $13CAN per litre.

Reanimation

Well I've just done the gearbox fluid also and just been for a blast down the motorway, I can definitely feel the car pulling smoother from 70 to 100 it feels great.

Reanimation

If this helps you,

Tools I used, 14mm hex socket, breaker bar/ratchet, penetrating spray, oil suction gun, trolley jack, Axle stands.

I removed one of the rear wheels to get better access to the top filler plug, the drain plug is much easier to remove, I replaced what I removed or just when it started to seep out from the filler plug.

waveterrorist

Once you get the filler bolts out it is braindead easy.
Don't remove the rear wheel just jack it up and let gravity help.

In my case there was some fine metal particles and afterwards
it was much more quiet. To think there is actually a change in
performance I would attribute to a placebo effect......

tw2

I just had the dealer do this. Cheapest job they have ever done for me. After changing the conductor plate myself a couple of months ago I didn't feel like I needed to jump under the car again in a hurry. No performance increase real or otherwise.

mis3

Knowing that the diff. fluid is not expensive, how much labour (in hours) did they charge? One post here said 1.3 hours.

tw2

0.3 hours which sounds like what it would take. The car was already in for camber arm installation if that changed anything but the labor for that was charged separately.