I had a gap this morning and decided to change the diff oil. I took the car for a short drive to heat things up.
Firstly made sure that I was able to unscrew the filler plug before undoing the drain plug. I couldn't imagine anything worse
than draining the diff oil and then finding I couldn't undo the filler plug
The old oil came out looking like freshly brewed espresso, it definitely didn't smell like espresso....I put it through a strainer just to check for any debris and found nothing.
Once most of the oil had drained out, I then jacked up the RR side and then the RL to get the rest of the old diff oil out.
Capacity is 2,5L approx. 2,4L drained.
I replaced the diff oil with Comma 80W–90 Hypoid GL-5 Gear Oil and found it easiest to use a plastic siphon pump to get the new oil into the diff.
I’m thinking that next week I’ll repeat this whole exercise just to give it a flush and refill again with fresh oil.
I've only had the car for just over a year and have never done any of this work before. In fact in the time I've had the car, by following advice on this Forum, on my own I’ve replaced the fuel tank, installed a new fuel pump, installed a stainless steel exhaust, installed Thermo-Tec heat shield and replaced all the carpets, renewed seat bases using pool noodles, new seat belts, serviced the original Becker Mexico and installed new front speaker, hidden ignition cutoff switch, replaced cracked steering wheel, new shocks, new suspension springs and rubbers as well as steering damper and all rubber bushings. Not to mention doing regular oil changes and servicing.
Also had 123 ignition installed by a mechanic.
It’s been a very mild winter so far here in the south of France, I've been driving the car everyday and enjoying every minute.
Best,
Mike