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Old Jan 18, 2022 | 05:48 PM
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WD40
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From: Alabama
Default Re: XF Coupe - Rear Diff Oil ?

Originally Posted by pizzaguy
We did mine at a Tech day in North GA. I worked on sticky keys and sound systems while Zach and Nick did my fluids.
I can't tell you what they used, it's been four years already.

Shown is Nick putting my HAWK HPS brake pads on the front, while others watch and offer beer.
I was working on a sticky key at the time....

From your picture is has to be this:
https://www.mobil.com/en/lubricants/...ube-ls-75w-90/
Simple as that.

There are two products which specifically state "quiet" or "quieter" (operation). That may just be slick marketing but either way they know what I want. Those 2 products are:
Royal Purple Max Gear 75W-90 Synthetic Gear Oil https://royalpurpledirect.com/max-ge...etic-gear-oil/
and...
Liqui Moly 22090 (Made in Germany) https://products.liqui-moly.us/fully...-75w-90-1.html

I am forgetting about all the 75W-140 oils unless someone wants to step forward in their defense. Does anyone want to speak to Liqui Moly or Royal Purple? It just occurred to me to change the diff oil whilst I've the rear raised-up renewing the fuel filter & hoses.

For 25+ years I had a cheap electric (car battery clamps) liquid transfer pump that I got from JC Whitney before the internet even existed. To clean it was futile and so it lived an oily but well-lubricated life always put back inside a plastic shopping bag. When I moved from FL to AL in 2014 it was one of the things I left up in the attic (I had pull-down stairs from the attic into my garage in that house). That pump was probably like a $5.99 special, and it sure as Hell paid for itself!!
 
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