VinhZXT Posted March 3, 2008 Share Posted March 3, 2008 Hi All, What type of LSD do I have here? I open it up and it doesn't look like the normal CLSD as shown in this picture Here are pictures of my LSD's internal: Notice the center spool. I can't find anyway to open mine. The 1st picture is from 240ZHoke's write up. My LSD is a 3.7 ratio also and it accepts the regular 280ZXT input shafts. It is not grabbing both wheels. Thanks for any input Vinh Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 3, 2008 Share Posted March 3, 2008 Looks like a 4 pinion open diff to me. I think some of the later shortnose R200s came with open 4 pinions, but none of the Z31's as far as I know. I haven't seen one apart like this, but I just don't see anything in yours that limits the slip. Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted March 3, 2008 Share Posted March 3, 2008 Vlsd ? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 3, 2008 Share Posted March 3, 2008 Here's a pic of a VLSD from Warren's album: and another from Z-Monster: Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted March 3, 2008 Author Share Posted March 3, 2008 This is a regular long nose R200 came out of a Z31. This is a weird open diff than. I just look at the 3rd post on the sticky. The internal of my R200 looks like the Q45's internal.. I have a Q45 rear in my garage so I will open it up tomorrow to check it out. Quote Link to comment Share on other sites More sharing options...
zcarnut Posted March 3, 2008 Share Posted March 3, 2008 Looks like a viscous LSD to me. The viscous unit is shown as item number 38411 on the fiche page of the VLSD version of the Z31. The viscous unit is sealed and the pics supplied by Jon appear to be “non†VLSD diffs. Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted March 3, 2008 Author Share Posted March 3, 2008 Zcarnut, Thanks for the confirmation and picture. The next question is why this VLSD accepts the 280ZXT input shafts???? What type of fluid should I use with this LSD for it to work? I put regular gear oil in it and it was whining. Thanks for the info Also I just read how the VLSD works and I am assuming the CLSD test won't work with this one. I am talking about the test where you spin the wheel then both should be turning the same direction. Thanks Vinh Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted March 4, 2008 Author Share Posted March 4, 2008 After more searching I am 100% positive that this is a VLSD from the 300ZXT SS model. A friend of mine took it to a machine shop and they did something to it to accept the 280ZXT input shafts. Ofcourse without the long input shaft the VLSD won't work properly based on Warren's info. Thanks for the info guys. V. Quote Link to comment Share on other sites More sharing options...
rudypoochris Posted March 4, 2008 Share Posted March 4, 2008 I concur on the VLSD. I will check Nissan FAST right now and see if the axle is the same between Japanese VLSD and open diffs. EDIT: Couldn't find anything conclusive on FAST. Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted March 4, 2008 Share Posted March 4, 2008 After more searching I am 100% positive that this is a VLSD from the 300ZXT SS model. A friend of mine took it to a machine shop and they did something to it to accept the 280ZXT input shafts. Ofcourse without the long input shaft the VLSD won't work properly based on Warren's info. Thanks for the info guys.V. I wonder what he had done, the SS VLSD has a larger spline count input stubs compared to the ZXT . The VLSD shaft inputs are larger... Quote Link to comment Share on other sites More sharing options...
Warren Posted March 4, 2008 Share Posted March 4, 2008 The upper ones are for the R200 3.70 VLSD...notice the top left one and the placement of the circlip groove as well as it's length. The lower ones are for the R200 3.54 OPEN from an 82 ZXT. Hope that clears it up a little. P.S. Here is a link with all the VLSD info you'd ever want (for the most part)... CLICK Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 4, 2008 Share Posted March 4, 2008 Sorry for the error guys. I thought the VLSD had the viscous part sealed in the middle of the side gears. I guess there are two viscous units one on each side gear... Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted March 4, 2008 Author Share Posted March 4, 2008 Warren, Thanks for the link. Quote Link to comment Share on other sites More sharing options...
Warren Posted March 4, 2008 Share Posted March 4, 2008 NO problem Vinh...I knew I was keeping that link for some reason...now I know why. HAHAHA, but I can take no credit, all I did was bookmark it a long time ago. Warren Quote Link to comment Share on other sites More sharing options...
triple B Posted March 4, 2008 Share Posted March 4, 2008 thats a very nice link i am glad u saved it me thinks i am going to go "dumpster divin" this summer for parts Quote Link to comment Share on other sites More sharing options...
SATAN Posted March 4, 2008 Share Posted March 4, 2008 I wonder what he had done, the SS VLSD has a larger spline count input stubs compared to the ZXT . The VLSD shaft inputs are larger... Assuming you are talking about the z31 only, then this is incorrect. They both use the 29 spline shaft. The 88ss is just longer to engage the viscous coupling. Quote Link to comment Share on other sites More sharing options...
rudypoochris Posted March 4, 2008 Share Posted March 4, 2008 Assuming you are talking about the z31 only, then this is incorrect. They both use the 29 spline shaft. The 88ss is just longer to engage the viscous coupling. Really!? I always HEARD the Z31 SS was a 30 spline... interesting. Quote Link to comment Share on other sites More sharing options...
SATAN Posted March 4, 2008 Share Posted March 4, 2008 Really!? I always HEARD the Z31 SS was a 30 spline... interesting. If the z31SS was a 30 spline, I wouldn't be screwing around with the Q45 diff, and the swap would be about 100 times easier. All z31 half shafts/input shafts slide into all z31 carriers. All = 29 spline NA/turbo alike, along with VLSD on the shiro special. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted March 5, 2008 Share Posted March 5, 2008 The upper ones are for the R200 3.70 VLSD...notice the top left one and the placement of the circlip groove as well as it's length. The lower ones are for the R200 3.54 OPEN from an 82 ZXT. Hope that clears it up a little. P.S. Here is a link with all the VLSD info you'd ever want (for the most part)... CLICK The shafts on the top look identical to the z32 vlsd shafts I have, mine just have a flange between the shaft and the CV. Quote Link to comment Share on other sites More sharing options...
SATAN Posted March 6, 2008 Share Posted March 6, 2008 The shafts on the top look identical to the z32 vlsd shafts I have, mine just have a flange between the shaft and the CV. They should be damn near identical if you got it out of a normally aspirated z32. They are both 29 spline. Quote Link to comment Share on other sites More sharing options...
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