Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing 2010 Roadster diff noise

Interesting, the link to ECS tuning says they sell "Castrol SAF XJ" in the text but the picture of the can is the newer Transmax limited slip 75w140. I have bought it and it doesn't say SAF XJ anywhere on the can ;-)

Who knows? Look at this! https://www.ecstuning.com/b-genuine...tial-fluid-saf-xjfm-5-liter/83222282583/

https://www.bimmerworld.com/Fluids/...00ml-bottle-E46-M3-E9X-M3-F8X-M3-M4.html

or in the UK
https://www.ebay.co.uk/p/1009509672

Castrol keeps saying successively, every few years, that a newer and better fluid has, first, replaced the SAF-XJ, then the replacement is replaced and so on.. It was/is also called Syntrax. When I spoke with BTR Dowunder, I got a curt, "we made it clear what you should you use"! , without elaboration. So considering how rarely this the change is needed and how imortant the right fluids are, I use the BMW product. (label above), especially now that the Morgan BTR axles have gone the sad way of the Morgan Salisburys :(, who wants to take a chance? I have used the BMW with BTR approval and haven't had a issue in 100,000 kms. I discretely did not ask them about anything else.

gmg

P.S. Capacity is 1.75 Pts/1.0 Lts/2.1 US Pts

Another update;
FIW I asked Castrol if their new Transmax 75W140 is suitable for this axle. Their reply in Dutch below, plus a translation.

"De opvolger van Castrol SAF XJ is Castrol Transmax Limited Slip LL 75W-140 en heeft dezelfde eigenschappen, het product bevat de LS additieven en is tevens BMW M en Mercedes AMG goedgekeurd"

"The successor to Castrol SAF XJ is Castrol Transmax Limited Slip LL 75W-140 and has the same properties, the product contains LS additives and is also BMW M and Mercedes AMG approved"

This is also what the Dutch Morgan importer uses.
I have driven the car with this oil and its is all quiet at the rear but I have not got the diff up to "working" temp yet. When the weather improves I will and report.
Regards, J

Well I have used Castrol Syntrax and more recently, the newer Transmax, over the past 12 years. They both include additives for LSDs, which my +4 has. I have done almost 50k with no issues.
Think you have nailed it, Better things to worry about in life.

Goed getaan. Now you can enjoy the car.

As soon as the wind and rain decreases a bit.