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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOption Codes 220 222 and 224 Thoughts
Leading reported evidence
Run swepco and it does well
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Performed · outcome unconfirmed
This is true, but at $500 a gallon or whatever it is for unicorn blood these days...I run SWEPCO and it does well, so long as it's not too cold outside.
Leading evidence: 'Run swepco and it does well' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace but make sure you' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Really just fluid changes but make sure you use a fluid that has the friction modifier for the LSD.
Replace factory crappy brass parts and weak friction plates
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Suggestion
I bought a used 40th anniversary diff , I had them replace the factory crappy brass parts and weak friction plates with a full guard transmission set of more robust longer lasting internals , set up 40/60 ( a stock 40th is very mild 25/27, most gt3s were 40/60) and installed in my 2004 PSM car .
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
Really just fluid changes but make sure you use a fluid that has the friction modifier for the LSD.
Replace factory crappy brass parts and weak friction plates
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
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Suggestion
I bought a used 40th anniversary diff , I had them replace the factory crappy brass parts and weak friction plates with a full guard transmission set of more robust longer lasting internals , set up 40/60 ( a stock 40th is very mild 25/27, most gt3s were 40/60) and installed in my 2004 PSM car .
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
This is true, but at $500 a gallon or whatever it is for unicorn blood these days...I run SWEPCO and it does well, so long as it's not too cold outside.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
20 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I am new to Rennlist and new to the Porsche world. I am 61 years old and have been lusting after a Porsche 911 since I was 15 years old. I have been looking for the last few months and I am getting close to making an offer. I would like some input on the following Options Codes that are shown as included on the car I am looking at. The codes in question are:
220 Locking differential
222 Limited Slip Differential
224 Active Brake Differential
My question is are these options desirable on a 996 and hopefully maintenance free, or possibly options that would significantly add to the cost of ownership if they were to fail or require scheduled maintenance? Do they add value to the car?
Thank you in advance for any help you can provide.
I'm not sure if they add value but I know that LSD is supposed to be a pretty uncommon (rare?) option on 996s. My car has it and the LSD, coupled with other unique options/combos, pushed me to purchase it. I have LSD, factory aerokit, full leather, stainless door jam guards, alum gauges/shifter/parking brake, coupled with Arena Red paint. I've convinced myself it's a uniquely optioned car....
An LSD does add value to the car but you will never notice the difference unless you track the car. Even then, you have to be able to drive it to the limits of adhesion to notice the advantages the LSD gives you.
Maintenance on it is no different than with an open diff. Really just fluid changes but make sure you use a fluid that has the friction modifier for the LSD.
I have never seen 222 or 224 on a 996, but I have 220 on my 40th anniversary edition.
They are clutch-pack LSDs and they wear out. When my car had 40k miles (when I bought it), I could feel the LSD working, but now at 81k miles I get inside wheel spin from time to time in autocross. Rebuilding the clutch packs is an option, and much cheaper than installing an LSD if you don't have one to begin with.
Not to jump to conclusions, but most 911 owners never drive in a manner that the LSD would be useful. It would add to resale value either way. I would never buy a Porsche without it.
This is true, but at $500 a gallon or whatever it is for unicorn blood these days...I run SWEPCO and it does well, so long as it's not too cold outside. Cold shifting is pretty bad below 50 degrees F.
The factory limited slip diff wears out quickly , after 35000-50000 miles or a half dozen track days .
It wasn't offered in cars with PSM because of concerns the two systems wouldn't work well together but after much testing it was offered in the 40th anniversary model with PSM and lsd.
I bought a used 40th anniversary diff , I had them replace the factory crappy brass parts and weak friction plates with a full guard transmission set of more robust longer lasting internals , set up 40/60 ( a stock 40th is very mild 25/27, most gt3s were 40/60) and installed in my 2004 PSM car .
Anyone who says a lsd doesn't make a difference in a street car has never driven one .
Amazing traction . Off the line and decelerating in the corners on twisty mountain roads.
IMO , A lsd will do more for performance than all the fabspeed exhausts and intakes in the world .
Power to the ground, especially in the wet.
If you can't find an lsd car , it is possible to fit a plate or geared diff aftermarket .
Is it a desirable option yes , but probably only for a small part of 911 owners.
It would add a small premium to the value of the car.
If I was faced with an immaculate non lsd 996 and a slightly scruffy higher milage 996 with LSD , I'd get the car that's in better condition with lower milage .
You can remove and install the diff with the tranny in the car for servicing , keeping cost down
I also have 220,222, and 224 on my '99 C2. I have the PSM button as well. Always wondered if it added any value to it. The PO of the car wasn't even aware of it and says the last 2 owners never tracked it, but I can't validate that in any way.
Everything points to me having a LSD in my non-PSM 2001 cab. It's not on the sticker so either it wasn't an option and/or not on the sticker (as in it was standard) or someone added it in the cars chain of ownership.
Jack up the rear and spin a tire. Even if your clutch packs are worn, it will still grab with no load. Spin one tire and see if other side spins the same way or opposite.
Took off with one tire on gravel and the other on tar and could feel the one spin and then the other bite and grab. Also put two tracks down on gravel. However you could tell one track started first with the other grabbing later.
Both of those are very similar to my Jeep, which has a LSD.
Thanks to everyone for their input to my question. There certainly is a lot to learn about these cars before pulling the trigger on a purchase. With the massive amount of shared knowledge available from Rennlist I am getting close. Looking to make my purchase before the snow flies. Thanks again....
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