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LSD Info Needed

Im trying to put together my budget and build list. A LSD is a must for me. I'm current looking at the OS Giken differential. But I'm trying to recall

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Old 12-23-2010, 10:20 AM   #1 (permalink)
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Default LSD Info Needed

Im trying to put together my budget and build list. A LSD is a must for me. I'm current looking at the OS Giken differential. But I'm trying to recall from my 350 days what was also needed with a LSD on a base model Z? Just seems I somewhat have a vague memory of some additional parts from the dealer for base models. So I need your help here. Thanks.
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Old 12-24-2010, 03:54 AM   #2 (permalink)
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automatic or manual? if manual then you will need some shims, with the clutch types you will also need fluid and the friction modifier for your diff.
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Old 12-24-2010, 09:58 AM   #3 (permalink)
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Yea, it's going to be a manual. So shims then. Thank you.
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Old 12-24-2010, 10:47 AM   #4 (permalink)
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Besides the optional shims (those are used for correcting the LSD alignment in the housing to prevent backlash) but the base model will need the longer stub shafts unless you buy an LSD that is designed for the base model.
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Old 12-24-2010, 12:57 PM   #5 (permalink)
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Quote:
Originally Posted by ChrisSlicks View Post
Besides the optional shims (those are used for correcting the LSD alignment in the housing to prevent backlash) but the base model will need the longer stub shafts unless you buy an LSD that is designed for the base model.
Now that you say that, it seems I somewhat recall this now.
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Old 12-29-2010, 05:37 AM   #6 (permalink)
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most of the lsd's are designed for the base, but yeah if you buy a sport model one you need a stub for a sport, if you buy a base model one you don't need anything. I bought a quaife and they pretty much only make the base model one, so i had to wait 3 months for nissan to send me a base axel stub.

The os giken falls into that category if you have a base your golden if your sport your screwed.
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Old 12-29-2010, 10:32 AM   #7 (permalink)
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Quote:
Originally Posted by 1slow370 View Post
most of the lsd's are designed for the base, but yeah if you buy a sport model one you need a stub for a sport, if you buy a base model one you don't need anything. I bought a quaife and they pretty much only make the base model one, so i had to wait 3 months for nissan to send me a base axel stub.

The os giken falls into that category if you have a base your golden if your sport your screwed.
I think Quaife has 2 models available now, one as an open diff replacement and one as a viscous unit replacement. As you said OS Giken is designed to replace the open diff so you need the base stub shaft for that one. The Carbonetics (clutch type) is designed to replace the viscous unit.
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Old 12-29-2010, 01:55 PM   #8 (permalink)
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This is really good to know, I planned on getting a base with this in mind so I am happy I do not need anything to fit the Quaife into the base differential.
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Old 12-30-2010, 05:22 AM   #9 (permalink)
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yeah it's hard to find the quaife sport one, they have both been out since 2003 as they are the exact ones used on the 350, also the quaife sport model diff requires you to not only have the longer viscous stub shaft but you also have to cut the end off it and grind on a camfer. The damn thing comes with a print showing you how to modify the stub. but if you get the base one you can't just cut the end off the sport shaft you have to get the base stub. they make one for the automatic case and gear too, tho i'm not 100% on if that one will fit the 370. i think it is something like the QD12f(manual requires base stubs) QD13f(manual requires modified sport stubs) QD11F(automatic base stubs)

At one point last year i was told there haven't been any sport ones imported in a while
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Old 12-30-2010, 12:23 PM   #10 (permalink)
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The quaife differntials are similar to (or the same as?) the torsen units are right? Does torsen make one that we can use? Seems to me that a torque sensing type would be the best choice right?
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Old 12-31-2010, 04:08 AM   #11 (permalink)
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i just answered this in another thread yeah the quaife is a helical type. they don't lock as hard as a clutch type but in my opinion they feel better and are a better street/track differential.
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Old 12-31-2010, 08:28 AM   #12 (permalink)
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Don't consider the clutch type locking action to be absolute, the amount of lock can be adjusted by varying the amount of slip additive. The hardcore folk actually rebuild the differentials with extra clutches for a stronger locking action, not necessary for us mere mortals. The clutch type differentials are better suited for track use, they don't generate as much heat as a torsen style differential, they last longer, are more predictable (if you lift a wheel or spin both wheels) and can be more easily rebuilt. The downside is that you have to do diff oil changes frequently.

The torsen style are very smooth for the street, and gives much more torque transfer than a viscous unit.
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Old 01-05-2011, 05:23 AM   #13 (permalink)
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don't forget the quaife lifetime warranty, so long as you keep fluid in it your good.
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Old 01-05-2011, 06:55 AM   #14 (permalink)
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Lifetime. That's pretty awesome. Can't really believe these LSD last so long without being rebuilt within some years.
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Old 01-05-2011, 07:27 AM   #15 (permalink)
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HOW ABOUT FOR ThE GUYS WITH AN AUTO!?!?! lol
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