[blue968]

HI Guys,

I read allot about the the limited slip option on these cars.
Can anybody tell me the benefit of this as to a regular one and I am assuming that this option is part of the the transmission am I correct???

Thanks

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[flash]

most simply put, limited slip provides more traction by providing power to both wheels, particularly in a corner

yes, it's in the trans on this car

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[blue968]

Thanks for the response
did limited slip ever come standard on any of the 968's or are they always an option???
Is there any way to tell by looking at the differntial if its a limited slip???
Can you raise the car and spin 1 wheel and the other should spin in the same direction and not in the oposite direction being in neutral ofcourse.

Thanks

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[flash]

always an option - 220 or 221, depending on the year - some searching here will turn up threads on this which will give you more details

your option sticker in the rear of the car should show it

no, you cannot do the "reverse spin check" on torsen lsd units, though you might on the clutch type

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[benspeeder]

If you can break the rear tires loose under power with no effort - good chance you have no LSD. My street car doesn't and its a great drift car if the mood strikes you i.e. bad day at work and leaving the office parking lot.

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[rxter]

<!--quoteo(post=79696:date=Sep 8 2009, 11:35 AM:name=benspeeder)-->QUOTE (benspeeder @ Sep 8 2009, 11:35 AM) <{POST_SNAPBACK}><!--quotec-->If you can break the rear tires loose under power with no effort - good chance you have no LSD. My street car doesn't and its a great drift car if the mood strikes you i.e. bad day at work and leaving the office parking lot.<!--QuoteEnd--><!--QuoteEEnd-->


One of my favorite things about this car. ON my RX-8 I have to turn the electronic nannies off and really wail on it to break it loose. On the 968 just a stab with the right foot and away...she...goes....


   

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[Cloud9...68]

I'm no expert on the subject, but I'm going to make a radical statement, based on my personal experience, that the impact of the type of differential on the grip coming out of corners under power is WAY overrated. From what I've seen, the tires make all the difference here. As I said in another post, with the Kumho's that came on my car, it was as though there was a tank of oil situated above the rear tires, the drain valve of which was actuated by the throttle. A little blip, and, as Paul Simon used to say, "We're slip-slidin' away..." My car has a Guard LSD. With my Sumitomo HTRZIII's, no matter how hard or abruptly I floor it coming out of a turn, the rear sticks as though I had dragster gumballs back there.

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[blue968]

Hey Guys thanks for the simple explanations. Finding the code 220 on my tag in my car explains why the tires never spin. I have never drove a 968 w/o LSD which is why I didn't know the diff. I always thought the car just never seem to have enough power to spin the ires. I guess I was wrong.

Thanks again

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[flash]

cloud - without getting into tires and how much of a difference they make, try driving a car hard without lsd - push it a bit too much at the wrong time, an it's all over the place - power oversteer is very easy to induce on those - fun at the right time - not so much at the wrong time

i too have the guards unit - it went in not long after i bought the car, and it made a HUGE difference in hook up

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[Cloud9...68]

Flash,

I don't doubt what you say, and I'd love to drive a couple of 968s with and without LSD with the same type tires back to back to test the impact of LSD. But for someone on a budget who can't afford an LSD, my experience suggests that the right tires can go a long way toward curing snap oversteer.

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[stewhatch]

<!--quoteo(post=79724:date=Sep 8 2009, 08:08 PM:name=Cloud9...68)-->QUOTE (Cloud9...68 @ Sep 8 2009, 08:08 PM) <{POST_SNAPBACK}><!--quotec-->Flash,

I don't doubt what you say, and I'd love to drive a couple of 968s with and without LSD with the same type tires back to back to test the impact of LSD. But for someone on a budget who can't afford an LSD, my experience suggests that the right tires can go a long way toward curing snap oversteer.<!--QuoteEnd--><!--QuoteEEnd-->

Last year my LSD trans succumbed to the well-known pinion issue. I purchased a good, used open diff (non LSD ) unit, and had that installed so I could still enjoy the car while the original LSD unit gets a rebuild. There is a difference in how the car handles when pushed hard in corners as well as off the line. I even notice a difference in the car's "feel" when decelerating after I back off the throttle, esp at hwy speed (seat of pants feeling that is hard to describe). Same (almost new) tires. I can't wait to get the LSD back and re-installed. Question - is it possible to add an LSD into an open-diff unit? I'd guess my choice would be an aftermarket unit.

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[Julian Allen]

It certainly is possible to change out the differential--that's what's needed to add an LSD--it's fairly straightforward in our transmission. Some say it can be done in the car--but it's a lot easier to do with the transmission on its side on a bench. The differential with the ring gear and bearings attached is pretty heavy to try a precision placement in a horizontal direction.
No change in the pinion bearing shims, but you may need to change the shims behind the differential carrier bearings.
Paul Guard's units, clutch or torsen, are extremely well made and appear to be nearly everyone's choice.

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[968crazy]

<!--quoteo(post=79724:date=Sep 8 2009, 11:08 PM:name=Cloud9...68)-->QUOTE (Cloud9...68 @ Sep 8 2009, 11:08 PM) <{POST_SNAPBACK}><!--quotec-->Flash,

I don't doubt what you say, and I'd love to drive a couple of 968s with and without LSD with the same type tires back to back to test the impact of LSD. But for someone on a budget who can't afford an LSD, my experience suggests that the right tires can go a long way toward curing snap oversteer.<!--QuoteEnd--><!--QuoteEEnd-->


Just try autocrossing with or without LSD even with hoosier slicks the car will break loose under power. Without LSD the car really sucks!

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[Cloud9...68]

<!--quoteo(post=79799:date=Sep 9 2009, 10:42 PM:name=968crazy)-->QUOTE (968crazy @ Sep 9 2009, 10:42 PM) <{POST_SNAPBACK}><!--quotec-->Just try autocrossing with or without LSD even with hoosier slicks the car will break loose under power. Without LSD the car really sucks!<!--QuoteEnd--><!--QuoteEEnd-->
I'll take your guys' word for it, as I've never driven a 968 without LSD. I was just amazed how violent the throttle-induced oversteer was on my LSD-equipped 968 before I switched tires. I'd never driven a car so uncontrollable before, and that was on the street, where I'm not a very aggressive driver (on the track it's a different story!).

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[rustech]

I recall the "break loose" habbits of peg-leg vs lsd being very different...lsd being more sudden but much later on then a peg-leg.

Perhaps this is what you've experienced.

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[flash]

lol - yeah - especially with clutch type units - when they let go, it's usually arms over elbows to recover

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[Cloud9...68]

Except I was driving incredibly slowly when I did a 360 on a public road the first week I had my car. It wasn't like I was driving aggressively, and the LSD allowed me to hang on at a high rate of speed when it finally let go. I remember even pulling out of parking lots with the wheels turned caused the car to get loosey-goosey in the back end. Very unnerving. The Sumitomo's completely cured my car's demonic tendencies. It would be very interesing to drive a non-LSD equipped car with these same incredible tires. Doubt I'll ever get a chance, though...

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[flash]

lol - i guess you had pretty crappy tires - glad it's sorted out though

a few of us are VERY interested in long term reviews of the sumis - we have been hearing some less than stellar things on cars that have run them for a while - very disappointing - i still hold out hope though, and i would be interested to hear how they are long term on a 968

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[Cloud9...68]

Yes, I guess all my experience really proves is that I had REALLY crappy tires.

As far as the Sumi's, I'll keep everybody posted. So far, they continue to be outstanding, in terms of grip, noise level, etc. But I may not be the best test case, because initially, I was tracking the car weekly, which of course caused them to wear much faster than a street car. I haven't tracked the car in the last six months or so, and it's not a daily driver, so their rate of wear has dropped to a very low level. I hope to get back to the track in a few months, but in the meantime, they're not getting much of a workout. I do try to take corners as fast as I can get away with to try to stay "in practice" for my eventual return to the track, and they definitely continue to delight.

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[flash]

actually that is a great test - the problems we have been hearing about all seem related to hard use and/or large camber angles - they don't seem to like scuffing very much - it may just be the cars they are on though - every different kind of car has a different result with a given tire - what works well on a bmw may not work on a 968, and visa versa, which is why i am very interested to hear how they work on a 968

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