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Thread: Help! Looking for R200 Diff shims

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    Registered User z boy mn's Avatar
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    Default Help! Looking for R200 Diff shims

    Hey everyone, I'm looking for (and having trouble finding) side bearing shims for my renovated R200 LSD. I have new bearings, etc., but the backlash is WAY too tight so the shop needs to move the carrier over some. It seems that all the places they contact don't have the ones we need and it's been a month with the car in their shop. Their next best option is to make some, but that will get spendy. It's a guess, but the shop is estimating we need a .80 and a .96 shim.

    I've tried MSA (of course), and a few Z shops in CA, Nissan doesn't make them anymore...

    Any ideas?
    Current Z: 1971 Datsun 240Z, 3.1 Stroker (F54 block, P90 head, 490-290 cam, triple Webers); 95% complete
    First Z: 1972 240Z, destroyed in a shipping accident. Ack!

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    Find some old open diffs and take their shims. You might also try to cross-reference the parts to other brands and models. For example, truck diffs might be plentiful. Of course, luck will be required to get those numbers.
    1976 280Z, with some minor modifications

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    Registered User z boy mn's Avatar
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    Quote Originally Posted by Zed Head View Post
    Find some old open diffs and take their shims. You might also try to cross-reference the parts to other brands and models. For example, truck diffs might be plentiful. Of course, luck will be required to get those numbers.
    Thanks for your help, Zedhead, I just started calling around Nissan dealerships and actually found someone who's good at hunting down parts and cross-referencing parts numbers. Turns out he can get the shims we need--it'll just take a week. I wonder if the shop looked hard enough, but as long as they come in I don't care! :-)
    Current Z: 1971 Datsun 240Z, 3.1 Stroker (F54 block, P90 head, 490-290 cam, triple Webers); 95% complete
    First Z: 1972 240Z, destroyed in a shipping accident. Ack!

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    Some more info on parts numbers or source vehicles would make this thread more valuable in the future...when shims are needed in the future.
    Charles

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    Registered User z boy mn's Avatar
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    Thanks for the suggestion, Patcon, let me see what I can do to fill in the blanks.

    1) I started looking for the attachment to this post...it's a close diagram for the LSD I have, I think it may be out of the 240SX Turbo--or thereabouts.

    2) Then, from there, I went to www.nissanparts.zone to get the full part number and check on availability.

    3) I used a 1979 Datsun 280ZX as the diff is similar and I needed the part 38453-XXXX. The link to that is here: 1979 Nissan 280ZX Rear Final Drive - NissanPartsZone.com.

    4) After doing some measurements on the diff, the shop and I figured we needed to move the carrier over so that on one side it was 2.03MM and on the other it was 2.45mm. We ordered the shim for 2.05 and 2.5 knowing we can sand them slightly on a stone to make the thinner. The backlash started out as .0025, which was WAY too tight. Stock is in the .012-.015 range, and the new shims should get us there.

    5) I ended up ordering the shims from the local Nissan Dealer, who found them around the country. They were $20 each, which is more than nissanpartszone, but this way I know they're genuine parts. They should take about a week to arrive--at least that's what they said.

    Hope this helps! :-D
    Attached Thumbnails Attached Thumbnails z31diff_clutch.pdf  
    Current Z: 1971 Datsun 240Z, 3.1 Stroker (F54 block, P90 head, 490-290 cam, triple Webers); 95% complete
    First Z: 1972 240Z, destroyed in a shipping accident. Ack!

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    Cool
    Charles

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