Gear oil viscosity

jason6989 · Sep 22, 2014

Anyone know what viscosity I have to put in my rear diff transfer case and gear...we only have a royal purple dealer where I live and I've used royal purple max gear with synerlec sae75w-90 for my gear.. I don't know what the old owner put in my diff and transfer case.
Could anyone suggest what rear diff and t case oil I should use?

Eclipse 2g 99 Gsx

Thanks in advance

synthetek · Sep 22, 2014

Redline heavy shock proof in the t-case and rear diff.

jason6989 · Sep 23, 2014

@synthetek we dont get redline here do you think royal purple max gear with synerlec sae75w-90 would be good for my transfer case and rear diff ?

fastfred · Sep 23, 2014

Royal purple is fine but, if you were willing to order i'd get the redline or amsoil. 75-90 is fine for the t case. I think the mitsu manual says 75w90 or somewhere close for the rear also. But id personally run a 75-140.

Type1DSMr · Sep 23, 2014

Oem mitsubishi diaqueen lsd oil from jnztuning.com

jason6989 · Sep 23, 2014

@fastfred @Type1DSMr unfortunately our customs does not allow us to order liquids LOL

, guess im just going to stick to royal purple 75w90 for rear diff and t case

Type1DSMr · Sep 23, 2014

I'm currently running royal purple in my transfer case and rear end. But previous owner also put it in the transmission as well and I've read that you shouldn't run the same weight in all three. I've notice that trans shifts better cold than warmed up but no problems with tcase or rear end.

oren hughbanks · Sep 23, 2014

I also run redline heavy weight shockproof in the tcase and rear end and have had zero issues with it. Can get a little tricky to pour or pump in there. I run a blend of oem trans oil and redline mt90. I have a local shop that's a redline dealer so it's easier to get than the oem stuff.

Mello · Sep 23, 2014

Don't know what you mean by customs doesn't allow liquids??? You're in AZ? You have FedEx or UPS? Is so they'll ship it but they will only do ground, can't go in the air. Just order what you'd like from one of the supporting vendors & they ship it to you.

fastfred · Sep 23, 2014

I also thought you were in arizona. Thats why I mentioned ordering it.

jason6989 · Sep 24, 2014

@Mello @fastfred im in Bahrain , i dont have an option to select my country as Bahrain on the forums

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Gear oil viscosity

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