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Cusco 2 Way Diff Readjustment?

RedDrifter
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RedDrifter Experienced

RedDrifter

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Can a Cusco 2 way LSD (R32 GTST) diff center be readjusted/retention to be a little less tight.

Its a little clunky witch doesn't worry me but its a little tight for street driving.

If it cant be no biggy Just thought I would ask the Question.

Cheers.

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https://www.sau.com.au/forums/topic/153870-cusco-2-way-diff-readjustment/
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Chris Wilson Proficient

Chris Wilson

Posted
Posted
Can a Cusco 2 way LSD (R32 GTST) diff center be readjusted/retention to be a little less tight.

Its a little clunky witch doesn't worry me but its a little tight for street driving.

If it cant be no biggy Just thought I would ask the Question.

Cheers.

You could grind the plates a bit thinner, maybe machine the case to have less preload, or just maybe remove one pair of plates, you'd need to get it stripped on the bench and have look / measure up.

  • 7 months later...
RedDrifter Experienced

RedDrifter

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  • Author
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You could grind the plates a bit thinner, maybe machine the case to have less preload, or just maybe remove one pair of plates, you'd need to get it stripped on the bench and have look / measure up.

Well I just had a win with the diff. I decided to go with an oil change and my god the difference is insane. I was using the incorrect oil weighting (90w140 I think) and I just changed it to penrite "sin 75" (75w90 synthetic oil).

The diff is silent with no chattering or clunking. Its nice and tight yet really smooth. I feel like a real mooron :P

RedDrifter Experienced

RedDrifter

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that oil is way to thin for the diff, stick an lsd oil in it like ls90 or ls140 plus an additive like ford motorsport diff additive or something similar

The oil I used is meant for LSD's.

It is designed to work for any gearbox / differential (includeing lsd's) that require 75w90 or 80w90.

It has worked the treat so I don't see it being a problem.

RedDrifter Experienced

RedDrifter

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im using redline shockproof NS with friction modifier.. on my 180 it is harsh as hell.. and clunks everywher.. the oil is 75-140 from memory...

was thinking of switching it out with castrol syntrans or the penrite.

what do u think.?

Well I would try the "SIN 75 or sin 80" these oils are synthetic and are GLI 4 and 5 complient so I would not use it to be braking in the diff but after that I dont see it being a problem.

Make sense to me as a thinner oil would penitrate the plates of a tight lsd better than a thicker oil.

STATUS Grand Master

STATUS

Posted
Posted
im using redline shockproof NS with friction modifier.. on my 180 it is harsh as hell.. and clunks everywher.. the oil is 75-140 from memory...

was thinking of switching it out with castrol syntrans or the penrite.

what do u think.?

yeah get that shock proof outta there, awesome for boxes.... baad for diffs. Redline do a excellent oil for mech diffs so use it instead 85w140.

STATUS Grand Master

STATUS

Posted
Posted
Well I would try the "SIN 75 or sin 80" these oils are synthetic and are GLI 4 and 5 complient so I would not use it to be braking in the diff but after that I dont see it being a problem.

Make sense to me as a thinner oil would penitrate the plates of a tight lsd better than a thicker oil.

i have no faith in penrite oils after seeing some of the results in oil sample tests but your theory on thinners oils is no-where close to reality unfortunately.

RedDrifter Experienced

RedDrifter

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Posted (edited)
i have no faith in penrite oils after seeing some of the results in oil sample tests but your theory on thinners oils is no-where close to reality unfortunately.

Different diffs will need different oils. I am just telling people about my troubles and my soltions to the issues. No lies just what I did and what outcome I had.

I agree that penright may not be the best brand around for oils but in this instance it worked out great.

I have had a search and KAAZ and Nismo diffs recommend the 80w90 weighting so I think the cusco RS diff in my r32 will be ok.

Edited by RedDrifter
Cubes Grand Master

Cubes

Posted
Posted
im using redline shockproof NS with friction modifier.. on my 180 it is harsh as hell.. and clunks everywher.. the oil is 75-140 from memory...

was thinking of switching it out with castrol syntrans or the penrite.

what do u think.?

Its the Syntrax you want.. Not the Syntrans.

The Syntrans is for transmissions and the syntrax for diff's.

The Castrol Syntrax has the ford lsd additive already in it.

markimak Grand Master

markimak

Posted
Posted
Its the Syntrax you want.. Not the Syntrans.

The Syntrans is for transmissions and the syntrax for diff's.

The Castrol Syntrax has the ford lsd additive already in it.

thanks cubes...

should i save the redline and put it in my box :P i think its a bit too thick for the box 75w-140 as its only been in ther for 2 practices and 800kms

  • 2 weeks later...
markimak Grand Master

markimak

Posted
Posted

hey guys just quickly my mate got me some penrite limslip 85w-140 extra heavy duty SAE API GL - 5/6 extreme pressure limited slip differentials oil

will this be suitable for my cusco 2way LSD.. im sick of the chatter and clunks with the Redline.

thanks

mark.

Cubes Grand Master

Cubes

Posted
Posted

markimak,

Try some friction modifier first. Unsure if ford still stock it or not.

But failing that simply drop the castrol saf-xa oil in to it that already has the friction modifier in it. OR buy redline again + friction modifier and it will be just as good.

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