[MPD47]

I'm considering purchasing a 968 6 speed box (NO TIPTRONICS) for my 944 Turbo. Was curious if anyone had one for sale and what the current going rate on them were. I'm not 100% sure I want to spend the money to play with gearing and get my quaife installed. But I have to look at this as an option.

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[banditsc]

[quote name='MPD47' post='28998' date='Dec 13 2006, 10:51 AM']I'm considering purchasing a 968 6 speed box (NO TIPTRONICS) for my 944 Turbo. Was curious if anyone had one for sale and what the current going rate on them were. I'm not 100% sure I want to spend the money to play with gearing and get my quaife installed. But I have to look at this as an option.[/quote]



There is one on Ebay right now, from what I understand you will also need the axles.

Ebay Link

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[SILVY968]

I am looking for a 6 spd transaxle as well.

Any leads?

LSD or not OK.

Brian

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[whakiewes]

All the dismantlers have several of them, mostly 6-speeds without LSD's. Last time I called, German Auto Dismanlters in Georgia did not have an LSD available but two standard 6-speeds. They were asking $3,000 I think, not 100% sure as I called around for days. The cheapest I have seen them go for is on Ebay, most hitting $1500-$2000.



If you are starting with a 951, you will find my more benefit from working the 951 transmission. I know you have seen this debating on Rennlist a ton of times. I drive my 968 back to back with a 350ishwhp 951 quite often, and I can tell you that you would be bored with the 968 tranny in a hurry. The gears are very short compared to the 951, and with the power I think you have, you will abliterate the gearing.



Save the money and guy an S2 R&P. It will give you the basic gearing of the 968 for about half the money. The only other advantage is 6 gear, but again its only based on what you want. I would have no problem with the 5-speed, although cruising with the 6-speed at 115-130mph is enjoyable...still getting 23-27mpg.



Why are you using a Quaife? Lifetime warranty? A gear type (torque biasing) LSD has no place in a high power car. The main gearing is that of an open differential. You'd be much better off on a standard 951 clutch type or a motorsport piece. The Guards clutch types are very nice, but costly. I would be glad to sell you a clutch type, 40% locking, lifetime warranty, KAAZ LSD for the 968 tranny for around $1100.



In short, three short track events in a 964RSA equipped with a Quaife ended in metal shaving parts throughout the diff. It was a measly 250ish whp and it never saw its intended use (straight line). Ever feel a 968 with a Torsen type LSD? They frequently open up easier than my open diff did!



Wes

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[bob blackwell]

Wonder what is causing the Torsen to"open up"? I have driven my 968 with Torsen LSD for over four years and over 84 thousand miles with no slipping ever, under any circumstance. I have used it on track, in daily driving, long trips and on autocross courses. For my money the factory Torsen LSD from the 1993 and newer 968 Porsches are the best money can buy. Good luck, Bob Blackwell.

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[whakiewes]

Bob,



Its the build of a Torsen differential that makes it open up. Its basis is using gearing that engages when torque is applied, not when the wheels open up. Its based on an open differential design. They were originally designed for drag racing cars that are driven on the street. They give nearly 100% lock in a straight line, but nearly no lock on turns. If you were to try to do a burn out, or just do a hard launch from a line, it will always be locked; thus leaving two lines. If you were to stick it hard in a turn, there is a good chance it will stay locked. If you were to over cook a turn at a track, or on the street for that matter, and inertia (not power) causes oversteer, 99% of the time it won't be locked which gives you the control of an open differential. On my 968 with an open diff I can easily leave two black marks, and easily power it sideways if done correctly. Where it scares me is controlling intertia based oversteer; which is typically the same oversteer that leads to spinning out.



On MPD's car, he has quite a bit of power, so it may remain locked more often. It may also eat through the gearing (which is nearly impossibly to replace vs. a clutch type which is user rebuildable) that makes it torque biasing and end up costing much more in the long run.



If the option exists to buy a torsen based 968 6-speed, I would always go for it. If its a matter of replacing the transmission though, I would save the money by buying an open diff 6-speed and install a clutch type.



Wes

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[MPD47]

Brian, I got mine from Shawn (Boost feen) you might shoot him a message and see if he has anymore.



Wes, thanks for the note, I had started reading similar things, but still opted for the 6 Speed unit, I'm having the quaife refurbed and selling it and sticking with factory LSD parts for the 6 speed unit. We're also running the car with significantly more RPM next season on the new turbo engine so I think I'll be ok with gearing.

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