Correct oil for mechanical lsd
 

What oil should I put in the rear mechanical limited slip differential on my hatch spec c? Same as gearbox?
Thanks

Hi

The diff needs a 75w-90 GL5 oil.

http://www.opieoils.co.uk/c-673-75w-...ion-fluid.aspx

The Fuchs Syn 5, Millers CRX, Red Line 75w-90 GL5, Motul Gear 300 and Gulf Competition are ideal for the diff. The Fuchs Sintopoid, Castrol Syntrax Longlife, Millers TRX, Motul Motylgear, Mobil SHC and Gulf Syngear are also good choices.

Cheers

Tim

Thanks Tim; can I use the same for gearbox? I'll be up to see you then.

Yes mate same oil as the gearbox as in the axles

Not same as box, normal 75/90 for dccd box but the LS stuff for rear diff, that's from what I gather for a spec c as Jdm have dccd. Non dccd can use same in both I thought it was.

Speak to Alyn at AS Performance, I received all my oils, diff included, from him only last week

Hi

Yes, but that is with a plated diff, with the mechanical diff, it takes the same as the gearbox.

Cheers

Tim

Ah ok, thanks for clarifying, so what diff does a uk 6 speed dccd have? Mechanical or plated?
As I have used the LS stuff in my rear diff

As far as I am aware, plated. You can use LS oils with mechanical diffs, but there is no need for the LS additives.

As the OP said it was a mechanical diff, I would hope he's right.

Cheers

Tim

I thought the classic dccd typeR etc was plated? So doesn't that make the newage r180 354 a mechanical rear diff?
Sorry it's got me confused now lol.

I'm not going to swear on it, but I thought the R180 is plated.

It's just I wonder why some use the plated internals from a classic type r diff and fit into a newage diff for better grip for competition cars etc is what's got me thinking.
But I also believe putting LS oil into a mechanical diff will do no harm, but putting non LS oil into a plated diff is not advisory?

With a plated diff, you need the additional friction modifiers in an LSD oil, otherwise the plates can be too keen to bind together. That can lead to excess wear, noise and make it less driveable. The friction modifiers in LSD oils allow the plates to slip a little, making the diff a bit more like an open diff (to an extent).

Cheers

Tim

^This