Diff Oil

[Hulk1010]

Hello

whats a good recommended diff oil to use?

thanks

Edited July 18, 2006 by Hulk1010

[Busky2k]

For the standard LSD? Castrol Syntrax or SAF-XA synthetics would do the job nicely.

[nuffsaid]

Redline 75W90 Gear Oil is supposedly good.

[GtstCoupe]

I use redline superlight shockproof in mine and box as well

[Hulk1010]

Hey

I ended up getting the castrol vmx80 for my gearbox but i never bought any diff oil, i'm about to get some of that redline 75W90 for the diff, the only thing i'm not sure about is do i go for the synthetic oil or the shockproof oil? on there site the 75w90 is listed under synthetic only, not shockproof.

If i do go for shockproof, should i get the superlight - lightweight or Heavy.

thanks

Edited January 9, 2007 by Hulk1010

[GTR32GUS]

Redline 75W90 Gear Oil is supposedly good.

I use it in my diff it is very very good , always had problems around roundabouts and tight corners with the inner wheel locking up tried a few oils none were any good , redline fixed my problem

I thought shockproof isn`t an LSD oil only for the gearbox, i use the Blue shockproof in my gearbox its mad too

[Hulk1010]

is there much difference between the normal 75W90 and the shockproof?

[GTR32GUS]

http://www.redlineoil.com/

i think they can do a better job of telling u the difference

Edited January 9, 2007 by GTR32GUS

[GTR32GUS]

LightWeight ShockProof™

A unique gear oil designed to lubricate racing transmissions and transaxles which see serious loads (not recommended for most syncro-type transmissions). It has excellent low-temperature flow which allows easier shifting when cold. May be used to obtain maximum power transfer in racing differentials which do not see high temperatures. Similar to a 75W140 gear oil, but with the lower internal friction of an SAE 30 motor oil.

Used in two-stroke and four-stroke motocross transmissions (often mixed in equal parts with SuperLight ShockProof™ Gear Oil).

Used in most road-racing differentials with moderate power and dogring racing transaxles.

Taken off the redline website , funny it not recommended for most synro gearboxes works mad in mine

[Godzilla32]

Yeah I'd make sure its suited to LSD diff's though..

[Kinks]

Yeah I'd make sure its suited to LSD diff's though..

You don't need "LSD" oil for a standard viscous diff. the viscous LSD unit is sealed from the rest of the diff enclosure and has its own fluid.

If you have a clutch type LSD (ie, you have a GTR, or your diff centre is aftermarket, or you have a skyline with A-LSD) then you need an "LSD" oil with friction modifiers in order for the clutch plates to work properly.

[Hulk1010]

I went to repco, autobahn and super cheat auto today and none of them had any redline products that i could see, where can i buy this stuff besides online?

--Nevermind just found some contact locations on there site--

Edited January 13, 2007 by Hulk1010

[MANWHORE]

instead of wasting your money on expensive redline which wont' do anything, because your diff is viscious (separate fluid for the viscous), I would honestly, use a castrol fluid.

Castrol lsx90. Cost ya about $30 for a 4L big bottle. You'll need 1.8L.

Castrol oils are a fairly good place to start from. At least it'll be correct.

Then, see how it feels, if it's good, then fine, it's good. From there, if you have a problem, then go mucking around with different fluids.

I have a mech diff, so I'm using motul oil, just so it changes the properties (won't do much to a viscous).

[Hulk1010]

thanks, when you say it feels good, what do you mean?,

[MANWHORE]

Well, I suppose what i'm trying to say is, it's not really going to make much of a difference either way, so spend 30 instead of 90.

[Godzilla32]

You don't need "LSD" oil for a standard viscous diff. the viscous LSD unit is sealed from the rest of the diff enclosure and has its own fluid.

If you have a clutch type LSD (ie, you have a GTR, or your diff centre is aftermarket, or you have a skyline with A-LSD) then you need an "LSD" oil with friction modifiers in order for the clutch plates to work properly.

So you only need LSD oil for a mechanical LSD? And viscous LSD has a sealed in amount of its own special fluid you dont ever need to change??

[arep3]

i got the redline lightweight shockproof in both diffs, gbox and transfer case. i bought it from bursons. ive never had any problems with it. runs beautifully

[Kinks]

So you only need LSD oil for a mechanical LSD? And viscous LSD has a sealed in amount of its own special fluid you dont ever need to change??

correct.

[Hulk1010]

thanks, i bought that castrol lsx 90 and getting it put in tomorrow

[SS8_Gohan]

series 1 R34 has a viscous or helical LSD, i can never remember which one...

so viscous doesn't need oil change... what about helical?