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Is there a code to tell if you have a limited slip differential ?

... anywhere on the car or transaxle ?
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82 Porsche 930 Euro, black, 31K miles.
Factory stock other than k27 turbo, B&B headers, GHL exhaust, Tial F40, 1 bar wastegate, MSD 6A ignition, 8" and 9" Fuch upgrade, H4 Xenon headlamps and a 930S steering wheel.
Old 07-20-2007, 03:39 AM
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Depends on the year- I know that '86 onwards (could be even earlier) have a white sticker under the crest of the bonnet showing the options on the car. I believe the code is 220 or 221 for LSD.
Old 07-20-2007, 05:02 AM
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I'm a bit of a newbie to Porsche, but I remember on the old muscle cars you could jack the rear end up and spin one of the wheels. If both spun the same direction, it was a limited slip, but if they spun in opposite directions, it was an open rear end. I suppose it would be a similar check with a 911/930 ? Doing a nice burnout is another way to tell, but it's not such a good idea with a Porsche.
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82 Porsche 930 Euro, black, 31K miles.
Factory stock other than k27 turbo, B&B headers, GHL exhaust, Tial F40, 1 bar wastegate, MSD 6A ignition, 8" and 9" Fuch upgrade, H4 Xenon headlamps and a 930S steering wheel.
Old 07-20-2007, 06:15 AM
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LOL, good luck getting your 930 to burn out without burning the clutch. Sticker under the crest wow just when I thought I knew all the idiosyncratic ways of Porsche.

Last edited by tonypeoni; 07-20-2007 at 08:13 AM..
Old 07-20-2007, 08:10 AM
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Jack it up and spin the wheel... its the same o'l story!
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Old 07-20-2007, 01:11 PM
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Quote:
Originally posted by JimCulp
Depends on the year- I know that '86 onwards (could be even earlier) have a white sticker under the crest of the bonnet showing the options on the car. I believe the code is 220 or 221 for LSD.
+1 Under the front hood is a large sticker. It'll list various codes. 220 is the one for an LSD. At least it was by the '86-'89 years (I see you have an earlier MY).

For example:

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Old 07-20-2007, 01:18 PM
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M220 should be the code for 40 percent locking diff. for 1978-1993 cars
Old 07-21-2007, 09:52 AM
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220 and 222 are also the codes for the LSD and TC for the 99 996.
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Old 07-21-2007, 04:50 PM
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