I have a chance to pick up an LSD diff from a 90 Infiniti M30 for quite cheap locally (as compared to the price of an 87 Turbo diff) And I have a couple questions.
#1: Is this the same R200 diff as the Z31? I have also heard of such things as a "long" nose R200 , and a "short" nose R200 , so I need to know for sure if this will fit.
#2: Even if maybe it's the incorrect size , can the internals be used in the R200 open diff case that I have on the car right now.
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1992 Yamaha FZR 1000. 145 Hp, all stock..
I have a chance to pick up an LSD diff from a 90 Infiniti M30 for quite cheap locally (as compared to the price of an 87 Turbo diff) And I have a couple questions.
#1: Is this the same R200 diff as the Z31? I have also heard of such things as a "long" nose R200 , and a "short" nose R200 , so I need to know for sure if this will fit.
#2: Even if maybe it's the incorrect size , can the internals be used in the R200 open diff case that I have on the car right now.
Ok here is the skinny as I know it.
All R200 diffs before 88 including all Z31's are the old style long pinion type. The only excpetion is the M30, these were all long pinion as well, even into the 90's.
No M30's had LSD's, they all had open 3.90 ratio diffs.
Some long style diffs had 10mm ring gear bolts and some had 12mm bolts, usualy the turbos had the 12 mm bolts. Turbos have different axle spline counts as well.
87-88 turbos had limited slips. All except the limited edition model were clutch types and are rebuildable. The limited edition is a viscous LSD and it sucks.
Long pinion and short pinion differential units are interchangeable provided that the ring gear bolts are the same and axle spline counts are the same.
This is what I know.
Mike
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There can only be one Icy Hot Stunta, Don't Hate.
No M30's had LSD's, they all had open 3.90 ratio diffs.
Well , I e-mailed the junkyard that has this diff and asked them specifically if it was a limited slip diff , and they said it was. So now I'm really confused. I guess the only way to find out is to go down and play around with it , see if it behaves as an LSD should behave (both axles turn the same direction , etc)
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1992 Yamaha FZR 1000. 145 Hp, all stock..
Well , I e-mailed the junkyard that has this diff and asked them specifically if it was a limited slip diff , and they said it was. So now I'm really confused. I guess the only way to find out is to go down and play around with it , see if it behaves as an LSD should behave (both axles turn the same direction , etc)
Or look at it. If you can see spider gears and not clutch packs, its not a LSD!
Mike
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There can only be one Icy Hot Stunta, Don't Hate.
Which junk yard was it? Most around here it seems barely know their head from a hole in the ground. I was out a Pull and Save in Aurora and they had an 86 Z31 which as I remember had an LSD. Then again after reading Mike's thorough description, why not just get a KAAZ or a Quaiffe or something like that so that you don't have question how long the used one will last if it is really one at all.
Troy
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SHIFT_Happiness
1992 S13 240SX SE Fastback KA24DE 5 spd - Type X Aero & Seibon Carbon Hood & Hatch -soon GT28RS
1993 U13 Altima SE KA24DET 5 spd w/ Nismo LSD - A high hp FWD can be fun (GT30R Turbo inside)
1990 Z32 300ZX VG30DETT 5 spd - 600HP & Very Civilized (working on twin GT28RS turbos)
Still trying to import a 1988 R31 Skyline GTS-R w/ RB20DET-R - only 800 produced (legal under show/display regs)
Which junk yard was it? Most around here it seems barely know their head from a hole in the ground. I was out a Pull and Save in Aurora and they had an 86 Z31 which as I remember had an LSD. Then again after reading Mike's thorough description, why not just get a KAAZ or a Quaiffe or something like that so that you don't have question how long the used one will last if it is really one at all.
Troy
because Ball is the king of the no buck mods! He gets power from tweaks. 13's for less than 3 bucks!
The Z31 non viscous LSD is pretty damn good, espxialy if you shim the clutch packs up about 0.010 per side, it locks up like one of new camming diffs, well almost as good. Steve Mitchell runs a shimed stocker.
Mike
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There can only be one Icy Hot Stunta, Don't Hate.
B@lliZtiK It took me awhile to find an LSD also. It looks as if I will be dropping the subframe and putting in my new LSD. I'll tell you how it goes. Also my polyurethane bushings and my aluminum bushings are going in so we will see how long that takes . I wouldn't trust the junkyard to much its probably just an open diff.
Also morepower2 how hard is it to shim the shim the clutch packs 0.010 per side on the R200 LSD?
I wonder if that one at Pull and Save is still available and if it's a real LSD. A guy I know was telling me that one was a 2+2. Don't suppose you'd want to get it for me and I'd pay you for it , if it is the real thing? It'll be a few days before I can get down that way , especially since it's been snowing. You tell me what it's worth to you.
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1992 Yamaha FZR 1000. 145 Hp, all stock..
because Ball is the king of the no buck mods! He gets power from tweaks. 13's for less than 3 bucks!
It was more like $20 , and I don't mind spending some money for an LSD. Looks like that is about the only thing keeping me down from low 13s. That and a crappy clutch.
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1992 Yamaha FZR 1000. 145 Hp, all stock..
Last edited by B@lliZtiK : Apr 23rd, 2004 at 08:52 AM.
Hey- I thought I had posted a thread in here but I guess I didnt. WITH MY CAR WHICH IS AN 87 TURBO, my one wheel spins forward and the other spins backwards- so whats the deal with 86 and up having lsd from the factory? Why is mine an open diff? Can I keep my stock case and put an lsd in? I was coming back from subway for lunch and to catch a light I had to make a u-turn- DUDE, I SLID THE ASS END OF MY CAR AROUND AND TOOK OFF SIDEWAYS!!! IT IS SO GREAT FINALLY OWNING A CAR THAT IS REAR WHEEL DRIVE WITH POWER!!!!!
__________________ ONE OF THESE DAYS I'LL FIGURE OUT HOW TO CHANGE MY WIPER BLADES
B@lliZtiK It took me awhile to find an LSD also. It looks as if I will be dropping the subframe and putting in my new LSD. I'll tell you how it goes. Also my polyurethane bushings and my aluminum bushings are going in so we will see how long that takes . I wouldn't trust the junkyard to much its probably just an open diff.
Also morepower2 how hard is it to shim the shim the clutch packs 0.010 per side on the R200 LSD?
You got to go to an industrial supply store and get some stainless shim stock, cut it to size and stick it under the cone washer preloaidng the clutches.
Mike
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There can only be one Icy Hot Stunta, Don't Hate.
You got to go to an industrial supply store and get some stainless shim stock, cut it to size and stick it under the cone washer preloaidng the clutches.
Mike
Isn't that a bit like welding an open diff? Doesn't it make it harder to turn corners and such?
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1992 Yamaha FZR 1000. 145 Hp, all stock..
Hey- I thought I had posted a thread in here but I guess I didnt. WITH MY CAR WHICH IS AN 87 TURBO, my one wheel spins forward and the other spins backwards- so whats the deal with 86 and up having lsd from the factory? Why is mine an open diff? Can I keep my stock case and put an lsd in? I was coming back from subway for lunch and to catch a light I had to make a u-turn- DUDE, I SLID THE ASS END OF MY CAR AROUND AND TOOK OFF SIDEWAYS!!! IT IS SO GREAT FINALLY OWNING A CAR THAT IS REAR WHEEL DRIVE WITH POWER!!!!!
What month was your car produced in 87. The reason being that not until 4/87 did LSDs come in Turbos. You could have a early 87 so you might have just missed the cut off.
What month was your car produced in 87. The reason being that not until 4/87 did LSDs come in Turbos. You could have a early 87 so you might have just missed the cut off.
So what about the LSDs in the 86's , then. When I was looking at diff parts online and asked about an 86 , the site asked if it was locking or nonlocking. Apparently must have been an option or at least available in 86.
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1992 Yamaha FZR 1000. 145 Hp, all stock..
This is one of the reasons I came to this site.
. I wouldn't trust the junkyard to much its probably just an open diff. 
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