Locking rear diff - which oil!

**Discofever** · 12th November 2016, 07:36 AM

Hi all,

I'm half way through my first oil change on the TDV6 Disco and I'm happy that I have adequately researched and used correct specs for the transmission and front diff.

I noticed I have the elctronic solenoid on the rear diff so am assuming it is the lockable ediff, as opposed to an open diff. I have read that this requires a different oil than the front, is this correct?

Also, I have read conflicting reports regarding transfer case oil, some people use the same ATF oil they use in the transmission, others us various brands of syntrax synthetic 75w-90.

So, following hours of forum internet searches as well as the Good Oil thread on this board I am none the wiser

I have two questions that I hope get some responses as I need some kind of consesus. The car is 10 years old, out of warranty and I'm open to suggestions outside Stealer recommendations.

1. What oil do you use in your rear ediff?

2. What oil do you use in you TC?

Your responses will greatly assist a mind that is slowly caving in, and allow a Father to put his anxiety to one side allowing him time with his children this weekend

**Narangga** · 12th November 2016, 07:49 AM

According to the owner's manual:

Castrol SAF Carbon Mod Plus

According to the Castrol Australia website - see your local dealer:

Castrol Australia - NetLube

(see note 1457)

Sorry I can't be more helpful than that.

**Redback** · 12th November 2016, 07:53 AM

Equivilent to whatever spec oil Land Rover use, and I'm pretty sure the rear diff is the same as the front, regardless of whether you have the E-diff.

TC

Full synthetic

SAE 75w90

GL-5

DIFFS

Full synthetic

SAE 75W90

GL-5

**Discofever** · 12th November 2016, 07:58 AM

Originally Posted by Narangga

According to the owner's manual:

Castrol SAF Carbon Mod Plus

According to the Castrol Australia website - see your local dealer:

Castrol Australia - NetLube

(see note 1457)

Sorry I can't be more helpful than that.

Thanks but I'm interested in what you use? As above? At this stage I'm looking for some kind of consensus rather than going by the book. If someone has used a certain oil for their ediff for 50k and all is well that's probably good enough for me.

**Narangga** · 12th November 2016, 08:15 AM

Originally Posted by Discofever

Thanks but I'm interested in what you use? As above? At this stage I'm looking for some kind of consensus rather than going by the book. If someone has used a certain oil for their ediff for 50k and all is well that's probably good enough for me.

Unfortunately no e-diff here so I can't even ask my mechanic.

**Narangga** · 12th November 2016, 08:16 AM

Originally Posted by Redback

Equivilent to whatever spec oil Land Rover use, and I'm pretty sure the rear diff is the same as the front, regardless of whether you have the E-diff.

D3 Owner's Manual does quote different spec for the locking rear Baz.

**shanegtr** · 12th November 2016, 08:18 AM

No idea on the E-diff as I dont have one. But for the transfer case I use Royal Purlple Syncromax. Meets the shell spec. The transfer case contains a clutch pack for the centre diff lockup so requires an oil spec very similar to auto trans oil.

**Discofever** · 12th November 2016, 08:21 AM

Originally Posted by Narangga

D3 Owner's Manual does quote different spec for the locking rear Baz.

Yeah owners on most O/S forums allude to that, although no general consensus. In South Africa many use a Castrol BOT formula.

**Discofever** · 12th November 2016, 08:26 AM

Originally Posted by shanegtr

No idea on the E-diff as I dont have one. But for the transfer case I use Royal Purlple Syncromax. Meets the shell spec. The transfer case contains a clutch pack for the centre diff lockup so requires an oil spec very similar to auto trans oil.

Yeah the RP was leading the way for me based on advice from UK D3 owners. I think that's the way I'll go. Now to sort this rear diff out...

**Narangga** · 12th November 2016, 08:36 AM

Have you read this post and the one following?

Seems a call to ta LR dealer might be the quickest way to get the required fluid for the e-diff.

http://www.aulro.com/afvb/l319-disco...ml#post1574717

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