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Does Tochigi Fuji Super LSD need a friction modifier?

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Does Tochigi Fuji Super LSD need a friction modifier?

 
Old 01-30-2019, 11:03 AM
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Default Does Tochigi Fuji Super LSD need a friction modifier?

Hi!

I ran into a small hickup while preparing a service for my friend, he has a 2003 sport with 6 speed and a locking differential. I personally have a Torsen so I have just always put a mix of lightweight shockproof and MT-90 into the differential without ever really thinking more about it.

I realized that he might have the Tochigi Fuji Super LSD since the car is a 2003 so I was wondering if that particular LSD needs a friction modifier to work properly or not. I understood that it is not like a traditional clutch based LSD, but instead uses cones of some sort.

Problem is quite simple, can I just tell him to put shockproof and MT90 without caring if it is a Torsen or TFS?
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Old 01-30-2019, 12:07 PM
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I wouldn't put shockproof in it. Wet Clutches are very picky about the oil they require. I would put exactly what it asks for in the manual and nothing else. Idk what the spec is, though.

For reference, I know of situations where the wrong oil caused the adhesive holding the friction material to be dissolved in a wet clutch system.
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Old 01-30-2019, 09:03 PM
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Originally Posted by sixshooter View Post
I wouldn't put shockproof in it. Wet Clutches are very picky about the oil they require. I would put exactly what it asks for in the manual and nothing else. Idk what the spec is, though.

For reference, I know of situations where the wrong oil caused the adhesive holding the friction material to be dissolved in a wet clutch system.
Also interested in what the Fuji calls for - anyone know?
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Old 01-31-2019, 04:47 AM
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Redline MT-90 will work just fine
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Old 01-31-2019, 09:15 AM
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Originally Posted by sixshooter View Post
I wouldn't put shockproof in it. Wet Clutches are very picky about the oil they require. I would put exactly what it asks for in the manual and nothing else. Idk what the spec is, though.

For reference, I know of situations where the wrong oil caused the adhesive holding the friction material to be dissolved in a wet clutch system.
I would use whatever is called for in the manual as well.

We did this in my MazdaSpeed 3 years ago, used whatever "super bad *** $$$$$$ fluid" that was supposed to be awesome, and it didn't have the right stuff. The car was back in the shop 400-500 miles later to put in the proper Ford stuff to get rid of the weird chatter/lockup issues it was having.
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Old 02-01-2019, 08:33 PM
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Hmm, i guess it is the best option then to follow the manual and put GL5 whatever that is. Thanks for answers. I am still curious however if this cone thing is actually sensitive to wrong oil or not.
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