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I bought one of these a while ago for my Starlet:  And I need to get it fitted inside this:  (or one similar to it anyway) Has anyone had any experience of fitting LSD's at all, or can recommend a someone to do it for me? I've heard that the preload & backlash need setting up, which I haven't got a clue about, so don't want to do it myself & mess it up! Any help gratefully received. |
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rob0r
East of England
Posts: 2,743
Club RR Member Number: 104
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Fitting a Limited Slip Diff?rob0r
@rob0r
Club Retro Rides Member 104
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Jul 15, 2011 10:23:53 GMT
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I haven't got a clue either, but the pictures on Racer86's blog look similar, no idea if it's any help! racer86.com/ |
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E30 320i 3.5 - E23 730 - E3 3.0si - E21 316 M42 - E32 750i
ETC
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Jul 15, 2011 11:18:56 GMT
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I'd try assembling it and check the gears as it rotates. You can get carrier shims for it to adjust the lash, etc. If you've got the whole thing on the bench it's a learning experience, but a specialist garage should be able to do it for you.
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bmw156
Part of things
Posts: 796
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Jul 15, 2011 12:36:50 GMT
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www.miata.net/garage/diff_rr.htmla very useful link i just found, had a read and it seems useful, someone tell me if I'm wrong lol. p.s don't apply the measurments to your car!
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Jul 15, 2011 20:35:31 GMT
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What you need to try and do is make the amount of play the same after you have fitted the diff. It does not have to be 100% accurate but don't take the curse word. If it wobbles aprox 1mm in either direction before you disassemble it then it should be as close to that as possible when you've put it all back together.
In theory, because you're only swapping out the middle part, if you put everything back together the same way as you took it apart with all the same shims in the same places then it should be fine.
Check the backlash by putting finger and thumb on either side of the diff CROWN-wheel and see how much play there is. There are more scientific ways to do this but you're not exactly rebuilding the thing, just changing one bit which shouldn't make any difference to the measurements.
The diff will move left and right between the driveshafts and that is normally controlled by shims. Make sure the shims you take out go back in the right order. Then the diff CROWN-wheel will be in the same place as it was and the backlash will be the same.
Easiest thing to do is to feel the backlash before you take it apart. Fit the LSD. Put it back together. Feel the backlash again, if it feels wrong then take it to someone 'professional' for a second opinion.
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Jul 15, 2011 20:39:54 GMT
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Also, depends on the design but check there are no plungers inside the ends of the driveshafts where they push into either side of the diff. If it has plungers and the LSD has no centre pin like some of them do then you may need to extend the plungers so the drive shafts continue to meet in the middle like they normally would.
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