HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Early LSD clutch replacement

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Early LSD clutch replacement

Post  haroldk on Wed Jul 12, 2017 10:04 am

I already know the early LSD parts are NLA and that you can replace them with AOR diff parts, but what I can't seem to find is if it's just the discs and spring washers that all have to be replaced or if the thrust rings (the parts the spider gears go in) have to be replaced, too. All the answers I've found are "send it to this shop and have them do it," which is not helpful. The parts are out there and it's not a complicated assembly. If anybody knows, I'd like to hear and have the information available for the next person, too.
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haroldk

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Re: Early LSD clutch replacement

Post  sharkey on Wed Jul 12, 2017 2:22 pm

i dont have a solid answer for you, but everything i read about the subject seemed to be $450-500 in parts. now looking at the cost of just the inner spline disc, outer spline disc and cup spring, that only adds up to around $200.

maybe send an email to cogscogs.com, they specialise in porsche transaxles and parts. the listing on their site isnt clear, the diagrams list the same part number for all the limited slips

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Re: Early LSD clutch replacement

Post  haroldk on Wed Jul 12, 2017 2:25 pm

sharkey wrote:i dont have a solid answer for you, but everything i read about the subject seemed to be $450-500 in parts. now looking at the cost of just the inner spline disc, outer spline disc and cup spring, that only adds up to around $200.

maybe send an email to cogscogs.com, they specialise in porsche transaxles and parts. the listing on their site isnt clear, the diagrams list the same part number for all the limited slips

Yeah, the PET for both show the same parts for everything. I've sent a message to Guard to see what they say, but I'll check Cogs, too.
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Re: Early LSD clutch replacement

Post  racertomtom on Tue Jul 18, 2017 8:50 pm

The AOR uses a .5mm thicker friction disc in it but also uses a .5mm thinner thrust ring (what I would call a clutch backing plate), So the surface area, spring tension and stacked dimension is all the same.

I THINK you can mill less than .5mm off of your thrust rings for more that 40% lock up that both LSDs produce.
Anyway, you'll have to create .5mm more clearance by milling or replacing the thrust rings.

The change was made to extend the maintenance interval of the LSD, not performance.

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Re: Early LSD clutch replacement

Post  haroldk on Wed Jul 19, 2017 7:14 am

Thank you! That's exactly the info I couldn't find anywhere. I don't have actual measurements for new parts, but I do have the relevant pages from the factory manual to know what the complete stack-up should be compared to the case and I've got access to a good lathe. I may just order up the same size plates as what was in there and face the rings to make the preload correct.
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