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YOUR RESEARCHLSD rebuild kit
Leading reported evidence
Replace another car's lsd
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Performed · outcome unconfirmed
I had another car's LSD replaced under warranty and it truly wakes up your car, when they work; the Porsche parts just don't last as long.
Leading evidence: 'Replace another car's lsd' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend kevin gross of catellus engineering' (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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Replace some 8~9 bmw diffs and no problems whatsoever
Performed · outcome unconfirmed
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0
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Performed · outcome unconfirmed · Original poster
adding new clutches and resurfacing the ramps (I guess) and adding an extra steel plate made the diff perform perfectrly, fhave renewed some 8~9 bmw diffs and no problems whatsoever.
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Suggestion
If you are not going to rebuild it yourself, I would recommend Kevin Gross of Catellus Engineering.
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Suggestion
I maybe wrong but I believe the primary reason was to change the lockup rate from the factory.
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Suggestion
After doing the proper test (or an approximation), I felt better.
Replace some 8~9 bmw diffs and no problems whatsoever
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 · Original poster
adding new clutches and resurfacing the ramps (I guess) and adding an extra steel plate made the diff perform perfectrly, fhave renewed some 8~9 bmw diffs and no problems whatsoever.
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.
23 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
hi , since noone is comenting my other threads I assumed that this forum is used to posting new ones for each question
so where do I get it, got the manual transmision, and it has the LSD in it but comparing to a lets say beemer LSD this one has almost no resistance, I can spin the flanges in opposite directions with almost no effort. (freely turning one flange the other turns the same way, and I removed the LSD element from the box to confirm it is an LSD)
read good reviews on guard transmissions kit, sent them an email ([email removed]) explaining the situation, but no response
maybe there is some other email etc?
what does it cost, where to buy it etc
read the info here, the construction is similar to BMW in every way so no big deal rebuilding/refreshing/reconstructing it (whatever you name it)
https://rennlist.com/forums/996-gt2-...d-rebuild.html
maybe there are some other cheaper/better options, and as I 've read it is no use to install new porsche parts as they are weak in preaload and clutch plates wear off far too quickly, so its crap
any thoughts suggestions are welcome.
Honestly, I don't know of anyone here that's rebuilt their own LSD. Your only source maybe from one of the pro's on here.
http://www.gboxweb.com/lsd.html
I'm interested in this but have to stick with OE parts for SCCA legality. I've never done anything like this before so I haven't been eager to tear into it.
If you are not going to rebuild it yourself, I would recommend Kevin Gross of Catellus Engineering. He did my LSD rebuild that I never put in my 968. I don't know why you would say that you wouldn't use OEM parts. If you are racing the car, yes, maybe, but if you are a street driver, the car should last for a very long time.
I don't know if after rebuilding it you would have to re-shim it to the gearbox, but I don't think so if it has already been installed in the same gear box. If you do, this is probably best left to somebody with the tools and know how.
Either call or email, he is a SUPER helpful guy. VERY reasonable prices. kevinceegross at gmail.com, [phone removed]
I maybe wrong but I believe the primary reason was to change the lockup rate from the factory. One may be able to modify the ramp up rate on the stock unit but could be too difficult or cost prohibitive for the diy'er. Not really about longevity.
I think the OP said they wear out too fast. The clutches do wear out, but if you are driving on the street and not racing, or even if you do occasional track days or autocross, the stock stuff should be just fine.
Ah gotcha. I wasn't sure if op's other post(or maybe someone else) in another thread mentioned wanting different ramp up rates. I agree with your comment about OEM longevity for the streets.
When buying parts to rebuild my transmission I was told that while the bearings I needed were available from Porsche USA, obtaining Porsche LSD clutches requires ordering them from Germany and waiting 6 weeks for them to arrive.
I ordered the "kit" from Guard and am very satisfied. My Porsche store mechanic was also very impressed and said, "this is how Porsche should have made these in the first place, it's a work of art."
The factory parts do wear fairly quick; within 5k miles you can already tell a difference. I had another car's LSD replaced under warranty and it truly wakes up your car, when they work; the Porsche parts just don't last as long.
I've had the Guard parts in for six months and all is good.
the main concern is that I can very easily spin the flanges in oposite directions, so obviously the diff doesn't work, because compared to bmw diffs, no matter how shot they have been seen I could never ever spin the flanges with my hands in opposite directions never, an I just pulled apart my LSD element and the clutches look in good shape sort of, as opposed to a "bad" beemer LSD (sometimes no lockup) the clutches are usually scraped and have lots of wear and tear on them, and they still work.
so I don't want to put that quickly wearable porsche crap (for price of diamonds) back in my diff.
here is a pic of worn beemer plates on a 300 + K km car compared to new ones (the diff performed rather well with these btw)
adding new clutches and resurfacing the ramps (I guess) and adding an extra steel plate made the diff perform perfectrly, fhave renewed some 8~9 bmw diffs and no problems whatsoever.
keep in mind, the Porsche LSD requires a lot of torque to start locking.
There is a thread somewhere hear that addresses the proper test procedure, the "by hand method" will not work even on a perfectly functional LSD.
Reason I know is I panicked when I was able to spin my wheels in opposite direction by hand. After doing the proper test (or an approximation), I felt better.
I have sent him a PM but no answer, maybe busy or smthng.
well judging by the conical tension spring plate it seems as if there is almost no tension at all, ok I am not sure if it is adequate to compare with the beemer, but still that has much more tension and the spring has a much sharper angle as well and what I want is - that the diff works with 25% lockup, and it is pretty low, so that there is no cracking sound on slow speed corners.
now it seems as if it has only 2% at most
yeah, but since you can get them used and in good condtion fairly cheap for beemers noone bothers getting a new one
only new one option is qaife but that is some 3 times the eaton
well small update on my current LSD, it seems to be serviced because the clutches look really perfect, but the pressure springs seem so vague, if no one replies and no other options come up, I think I am going to try out the pressure springs from beemer, and machine them to the right size, and if necessary will machine the ramps, all that can be returned. ( with an extra steel plate )
but by now I hope that Gtgears will give some answer.
