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Porsche Crest lsd help!!

I have a 1989 944 na and i am pretty sure that i have an lsd because when i drift the skidmarks are from both tires but im not sure because on some of the drifts you can see the front tires skidmarks too. So it could just be a skid not the tire acyualy spinning. I jacked the car up and spun the rear wheel to see if the other one would spin backwards or forwards and it did neither. Im so confused what is going on.
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Old 03-21-2005, 05:52 PM
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If the other wheel did nothing, I would dare say you do NOT have lsd. Check your option codes and see what the car came with originally.

944 option codes
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Old 03-21-2005, 06:02 PM
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Hmm, did nothing?... I don't know what to tell you.
In a properly operating open differential, it will spin the opposite direction, in a properly operating limited slip unit, it will spin the same way.

Maybe it's the torsen unit? I know it uses fluid pressure or something to spin the other wheel.
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Old 03-21-2005, 06:12 PM
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Quote:
Originally posted by Zero10
Hmm, did nothing?... I don't know what to tell you.
In a properly operating open differential, it will spin the opposite direction,
An open differential will sometimes do nothing when spinning one wheel. If the trans is in neutral and the brakes provide more friction than the r&p, nothing will happen.
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75 914 - Undecided.
80 931 - Gone, but not forgotten.
72 914 - old toy- sold.
And a whole bunch of German scrap metal shaped like 924's.


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Old 03-21-2005, 06:18 PM
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What do i do with the option codes. An open dif is what exactly. when i do burnouts the rear feels like its skipping real rough not like the wheels are spinning nicely. Could my lsd or whatvers in there just be shot. I do drift a lot in this car.
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Old 03-21-2005, 07:25 PM
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Quote:
Originally posted by 944drift
What do i do with the option codes.
220 Limited Slip Differential
221 Porsche-locking differential
P08 Limited Slip Differential

See if they match.
Old 03-21-2005, 07:41 PM
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sorry but i dont follow. What do I match the codes to.
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Old 03-22-2005, 08:09 AM
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Quote:
Originally posted by 944drift
sorry but i dont follow. What do I match the codes to.
Do you have the car's warranty & maintenance manual?

If so, on page one there should be a sticker with lots of codes, these can used to find out what options your car came with.

If not, pop the rear hatch & pull the carpet down as though you were changing a brake light bulb, there should be the same sticker on the driver's side near the tail light.

Then use the link Wolf1 posted & you're set.

Last edited by procon; 03-22-2005 at 08:27 AM..
Old 03-22-2005, 08:24 AM
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There are lots of 944s out there that do not have the original transmission anymore. Take your car somewhere safe. Put one rear wheel in the dirt and the other on the road. Put her in first and rev her up and dump the clutch. If your one wheel in the dirt spins like crazy and you don't go anywhere, you have an open diff. If your car launchs amid a cloud of rubber, and dirt, you have a lsd diff. If you have a weak R&P, you will hear a loud grinding noise, and you won't go anywhere. Good luck.
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Old 03-22-2005, 02:03 PM
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