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Snail Shell LSD Swap

 
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doolie72  



Joined: 01 Dec 2018
Posts: 23
Location: California, USA

PostPosted: Tue Dec 03, 2019 10:31 am    Post subject: Snail Shell LSD Swap Reply with quote

Hi all,

I have an original ZF LSD straight outa 931 snail shell trans. I'm looking at installing it into my 1980 931 but not sure of the procedure. Looks like it can be done without dropping the transaxle, but I'm assuming I can't just throw it in without some sort of shimming. If anyone knows how this is done I'd love to know!

Cheers

Jim
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CÚdric  



Joined: 27 Aug 2004
Posts: 1924
Location: Sweden

PostPosted: Tue Dec 03, 2019 8:05 pm    Post subject: Reply with quote

Do you have acess to the factory manual? Its all in there.
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doolie72  



Joined: 01 Dec 2018
Posts: 23
Location: California, USA

PostPosted: Wed Dec 04, 2019 4:49 am    Post subject: Reply with quote

CÚdric wrote:
Do you have acess to the factory manual? Its all in there.


I do now!

Seems a fairly complex process so I might remove the tranny and take to my local specialist

Thanks
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CÚdric  



Joined: 27 Aug 2004
Posts: 1924
Location: Sweden

PostPosted: Wed Dec 04, 2019 5:52 am    Post subject: Reply with quote

If you keep the ring and pinion, in theory you should only need to set the bearing preload. But its a bit tricky to measure as you can see in the manual, and you might need different shims to get it right.
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