Loosening 2 Way Diff?

[PHATR32]

hey guys,

does anyone know what kinda oil would be the best to "loosen" a 2way diff, so it doesnt lockup so harshly??

any additives etc??

thanks

steve

[SNG]

Hello,

I would like to know the answer to this too.

What oil are you using at the moment?

Im pretty sure im using the wrong type, so i want to change it, im using redline light weight in it atm, because i had some left over from when i filled the gearbox, and its an absolute pain in the ass driving it around slow corners.

Ive done a search and the general suggestion is redline mt90 for diff's, but don't know if thats the best option for really tight diffs.

Cheers.

[MerlinTheHapyPig]

Interesting question, however I have a feeling you can't really do anything about it without taking the diff out and getting a diff specialist to look at it.

My advise is to go to a workshop that specialises in diff's and ask them what you can do. or find someone with a looser 2-way and do a swap.

Some diff's (eg Nismo) allow you to adjust how tight it is, but most diff's don't.

[krizza_ca18det]

From my experience with different oils in my mech diff, you can't go past Castrol SAF-XA synthetic if you want a more street friendly diff. I found that other LSD oils (including Redline lightweight shockproof) make a tight mech very clunky.

I went through a long saga with mine including getting it pulled down and inspected / reshimmed, and the only thing that made it streetable was the Castrol oil.

Edited February 9, 2006 by krizza_ca18det

[PHATR32]

sweet! the saf-XA is exactlly what i bought! and its going in today hopefully.

steve

[Cubes]

Bl4ck32 runs a nismo 2way adjustable.

I do remember some one suggesting to adjust a little tighter so that it doesn't disengage so easily around corners, obviously resulting in slight tyre squeel but at least there will be very little clunk. He has yet to adjust it, its currently on the loosest setting.

Let us know how the castrol performs. The clunkyness is the only thing putting myself off a mech. lsd.

[PHATR32]

its defently not adjustible. i had the diff out and pulled apart.

[SNG]

From my experience with different oils in my mech diff, you can't go past Castrol SAF-XA synthetic if you want a more street friendly diff. I found that other LSD oils (including Redline lightweight shockproof) make a tight mech very clunky.

I went through a long saga with mine including getting it pulled down and inspected / reshimmed, and the only thing that made it streetable was the Castrol oil.

<{POST_SNAPBACK}>

I must agree with this, before i changed the oil in the diff to redline lightweight, the diff was definetly not as tight, loud and clunky, after i changed over and the oil was run in a little, the diff started to get very loud clunky and tight, with the tyres locking up and chirping while turning corners at intersections. I think i will give this Castrol SAF-XA synthetic a go.

[rev210]

I Have also found the redline lightweight to be pretty useless as a diff oil even in the factory LSD. To be fair redline on the bottle they do mention that additional friction modifier may need to be added for LSDs to get them working right.

[PHATR32]

well i took it for a lap arond the block a few times (20 times!) and it seemed to be a lot quieter than whats it was when i first got it, although i didnt do too many tight turns etc.

steve

[SNG]

well i took it for a lap arond the block a few times (20 times!) and it seemed to be a lot quieter than whats it was when i first got it, although i didnt do too many tight turns etc.

steve

Hello,

Hows the diff feeling and sounding 2 or so weeks down the track? Also what kind of tool and size did u use to unscrew the bolts? I went to change the oil but to my frustration i didn't have anything that i could use to unscrew them, i will have to go and buy some, and help appreciated.

Cheers!

SNG.

[PHATR32]

hey man, i ahvnt driven it since then (she aint licened) so i dont know ifs made any differance.

as for the tool, i used a rachet off a large socket set with a socket. the square is almost the right size for the hole/

steve

[SNG]

Hello,

Does anyone know if its alright to buy and use some sort of spray to loosen the filler and drain bolts? ive just about destroyed my tool, and bent the handle back and forth a few times and the bolt still refuses to budge, or will it contaminate the oil or loosen the bolt so it may work its way loose later down the track?

Thanks,

SNG.

Also to ask another pretty stupid obvious question, it is counter-clockwise to loosen correct?

Edited February 27, 2006 by SNG

[ToF]

Yes counter-clockwise is the way to loosen. Also you can spray some WD-40 or RP-7 and let it soak in for a while then have a go again.

[SNG]

Hello,

Just to give some feedback, changed the oil over today to the Castrol SAF-XA Synthetic, beautiful stuff, fixed my problems immediately, no more clunking at all nor shudder through the car or chirping of the wheels going thru corners, recommend giving it a shot if your having problems like i did.

SNG.

[Bl4cK32]

alright, im gunna give the castrol a go.

Its way overdue for a change, so i'll see what happens...

How much is the SAF-XA?

[Cubes]

Might sway me in grabbing a 2way if its a little nicer.

[SNG]

Hey guys,

Yeah it definitely worked in my case, but as i mentioned earlier above, i incorrectly had redline superlight weight gearbox oil in it so i don't know if that made it worse than it should have and consequently it seems alot better now than what im used to with it.

From memory i *think* it was around 20 bux a bottle of 1 litre roughly from auto one? (You will need about 2 litres) I don't know what type of diff i have, but when i had it on the hoist, when i turned the rear wheel one way, the opposing wheel turns the opposite way, and the diff itself looks aftermarket compared to my previous GTR, i was told that i had an mech diff.

It now almost feels like my last GTR which was stock, but i swear i can still kinda feel it giving resistance very minutely when going around corners.

I just wanted to give some feedback from my personal experience regarding this oil, it may work in your case, it may not.

Cheers!

SNG.

[Chris Wilson]

Chrylser make a rear diff oil additive for they call their Jeep Cherokee range, here in the UK (4wd 4x4). The plate type rear diff is poor in these, and tends to clunk and chatter (as well as the CWP wears out for fun...). Some people get really up tight about it and Chryler, like GM did in the 70's with the Corvette, came out with a friction additive for the diff oil. If you bung 2 bottles of it in a plate type diff it will often stop chattering and ratcheting, but a lot depends on the preload it's set to, and the style of the friction plates. Worth a go, it's not expensive over here, at least.

[Interloper]

does anyone know if the Castrol SAF-XA Synthetic is good to use in a stock viscous R32 diff?

or can anyone recommend a good lsd oil to use in a viscous lsd?

cheers.