I read a thread about the changes for the rear differential over the years. Some say that the rear changed for the X358. Can anyone confirm that the rear differential fluid for the X358 is 75w-140. Planning on using the Royal Purple 75w-140 that many people referenced using in their X350. Just wanted to make sure this is safe and recommended for the X358.

 

The lubricant (2012 Jag Specs document) should be to Jaguar/Ford spec M2C 192A Synthetic so if the oil you propose says it meets that spec then fine, but it doesn't mention that spec then personally I'd avoid it (well actually I'd just use Motorcraft XY-75W140-QL0 [which does meet the spec and is probably much cheaper])

Edit; Ah, see Jaguar Motor Project: January 2006 They say RP 75W140 doesn't claim to meet the spec.

 

You can find Valvoline SynPower 75w-140 at almost any parts store, is full synthetic, meets WSL-M2C192-A, and requires no other additives.

 

I can't see any drain/fill plugs on mine. Can anyone give me a hint?

 

Rear cover, right side, about half way up. Use a 3/8" breaker bar or shallow headed ratchet to loosen the plug, and you will need to suck the fluid out with a pump. You should get about 1.25 liter out.