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Best additive for lsd

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Old Jun 4, 2009 | 06:48 PM
  #16  
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Originally Posted by Adam2562
how much gear oil does the diff take.. and if i went with redlines NS gear oil for non-lsd do you think that'll wear out the lsd unit quicker
Yes go to napa/carquest and pick up a tube of Limited Slip additive, aventually it will wear the clutches out if you dont use the additive. It lets the clutches slip some when you make the turn.
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Old Jun 4, 2009 | 09:48 PM
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hmmm i see.. i just ordered royal purple 75w90 from amazon.. got free shipping too lol
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Old Jun 4, 2009 | 09:48 PM
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apparently it has the friction modifer stuff in it
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Old Jun 5, 2009 | 05:12 AM
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Originally Posted by Adam2562
apparently it has the friction modifer stuff in it
then your good
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Old Jun 5, 2009 | 10:00 AM
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I can verify that the dealer uses a "Kendall" LSD additive in all our diff services. I am not sure if synthetic or conventional is better over one or the other, I just know when I did supra, tundra, and other LSD diffs, we add gear oil then add the Kendall LSD additive. I don't have a LSD, so I have no personal preference, I just thought I'd tell you what the dealer used.
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Old Jun 5, 2009 | 10:08 AM
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thanks for the info!!
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Old Jun 5, 2009 | 11:17 AM
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OK.. so I we have a factory supra LSD we DONT need any additive?? Sorry if I missed something..
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Old Jun 5, 2009 | 04:07 PM
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im pretty sure you do.. otherwise from what i've read it seems that ur clutch will lockup easier when not really needed.. someone correct me if im wrong please
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Old Jun 5, 2009 | 08:39 PM
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Adam, for a complete flush and fill, your housing will hold btw. 1.6-1.8 quarts. From all the years that I've worked on cars, I've found that the GM Slip modifier is the best out there. It cost a little more than others but is designed for high tq. and hp cars ranging from corvette's to those big diesel trucks that haul heavy loads.
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Old Jun 5, 2009 | 10:54 PM
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k i bought 3 qts just to be safe... thanks!
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Old Jun 6, 2009 | 07:45 AM
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Originally Posted by Adam2562
im pretty sure you do.. otherwise from what i've read it seems that ur clutch will lockup easier when not really needed.. someone correct me if im wrong please
Wrng haaha, well see what happens is if you have lsd and you dont use the additive it wears out the clutches and the worst thing that can happend is your LSD will be no longer LSD, it will spin one wheel. The additive is just simply makes the gear fluid slightly more slick and it alows the clutches to slip when you make a sharp turn instead of rubbing against each other and wearing out. Best way i can describe it. YOu might also experience noises pulling out driveways,making u turns from your rear end when you dont use the additives.
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Old Jun 6, 2009 | 10:57 AM
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But the stock Toyota Supra TT one is a torsen... no clutches// SO do we still need to put the additives in?
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Old Jun 23, 2009 | 01:15 PM
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Originally Posted by Alexus_300
Adam, for a complete flush and fill, your housing will hold btw. 1.6-1.8 quarts. From all the years that I've worked on cars, I've found that the GM Slip modifier is the best out there. It cost a little more than others but is designed for high tq. and hp cars ranging from corvette's to those big diesel trucks that haul heavy loads.
I have been flushing and filling the factory LSD (same as a MKIII Supra) in my '92 Cressida for years and I have always used the Ford additive. In fact the local Toyota dealer use to actually sell the Ford modifier in the Toyota parts department.
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Old Jun 23, 2009 | 10:31 PM
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Originally Posted by newgsman
I have been flushing and filling the factory LSD (same as a MKIII Supra) in my '92 Cressida for years and I have always used the Ford additive. In fact the local Toyota dealer use to actually sell the Ford modifier in the Toyota parts department.
I was just stating my opinion here. I'm not sure how much drivetrain shock you load on your cressida, but have you ever tried loading 600+ lb/ft. of tq. then you'll know what I mean. Things will break eventually, but I've noticed that the GM stuff takes away more wheel hop than other brands of LSD additive.
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Old Jun 25, 2009 | 06:55 PM
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Originally Posted by Alexus_300
I was just stating my opinion here. I'm not sure how much drivetrain shock you load on your cressida, but have you ever tried loading 600+ lb/ft. of tq. then you'll know what I mean. Things will break eventually, but I've noticed that the GM stuff takes away more wheel hop than other brands of LSD additive.
Me too, wasn't trying to downplay anything you said, just saying what I have done. No 600+lb/ft on the Cress but it has spent loads of time spinning in the snow which also requires good lubrication. This has been going on for over fifteen winters and close to 500K kilometers. Never tried the GM stuff. Maybe I will...
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