SATAN Posted March 3, 2008 Share Posted March 3, 2008 Dont know if it has been brought up or not, but the z31 R200 came both 2 pinion and 4 pinion. Only the z31 r200's with the LSD's or VLSD's came with 4 pinions. Link to comment Share on other sites More sharing options...
madkaw Posted March 3, 2008 Share Posted March 3, 2008 Jon, Hope this goes with the flow of this thread but I wanted to know is whether the yokes for all these r160,r180,r200 are interchangable? Link to comment Share on other sites More sharing options...
JMortensen Posted March 3, 2008 Author Share Posted March 3, 2008 Jon,Hope this goes with the flow of this thread but I wanted to know is whether the yokes for all these r160,r180,r200 are interchangable? I don't believe that they are. I think the spline count on the end of the pinion is different on all of them. Haven't got any proof of that, but I think it's right. Link to comment Share on other sites More sharing options...
ktm Posted March 16, 2008 Share Posted March 16, 2008 For the R200 swap into a 240z, when swapping the pinion flange on the R200, do NOT use the flange from a 1975 280z. The bolt spacing and diameter was different for this year and this year only. Thus, the driveshaft will not bolt up to the differential. Link to comment Share on other sites More sharing options...
z-ya Posted March 16, 2008 Share Posted March 16, 2008 For the R200 swap into a 240z, when swapping the pinion flange on the R200, do NOT use the flange from a 1975 280z. The bolt spacing and diameter was different for this year and this year only. Thus, the driveshaft will not bolt up to the differential. I have never seen this. As far as I know, all Z differentials from 70-83 have the same input flange bolt circle. Yes, the ones on the R200 are round instead of rectangular in shape, but the bolt circles are the same (just put one in a few weeks ago). The Z31s have a different bolt circle, so when you swap in a Z31 CLSD, you need to swap the input flange from a 75-83 R200. Link to comment Share on other sites More sharing options...
ktm Posted March 16, 2008 Share Posted March 16, 2008 Ok, you made me go out, crawl under my car and take pictures. z-ya, it's documented over at Zcar.com believe it or not. The 1975 R200 used a 10mm diameter bolt instead of an 8mm diameter bolt, and the bolt spacing is slightly wider than the "standard" bolt spacing. Following are the pictures of my driveshaft flange and the 1975 differential flange. You can clearly see that the bolt hole on the differential flange is larger than the driveshaft, that the spacing of the recess' are different (center of flanges), and that the bolt spacing is different. Link to comment Share on other sites More sharing options...
z-ya Posted March 17, 2008 Share Posted March 17, 2008 Learn something every day! I guess I've never had my hands on a 75'. Thanks for the photos! Link to comment Share on other sites More sharing options...
mudtoy1986 Posted April 19, 2008 Share Posted April 19, 2008 hey man i got an 83 280zxt i think i have the r200 dif not shure though didnt acualy see what else acualy fits in place if what i got breaks i have heard roumors that pretty much anything nissan will fit could i be wrong Link to comment Share on other sites More sharing options...
z-ya Posted April 20, 2008 Share Posted April 20, 2008 I think 280ZXs came with both the R180 and R200 depending on model. Some came with the 3.9:1 R200. None were LSDs. Link to comment Share on other sites More sharing options...
zcarglen Posted May 3, 2008 Share Posted May 3, 2008 I need to speak to anyone who has placed the Cusco CLSD into the R200 longnose, before I pre-pay for the MZ model to be shipped from Japan. By the way, Jon, top shelf piece of research. Link to comment Share on other sites More sharing options...
HowlerMonkey Posted May 6, 2008 Share Posted May 6, 2008 The flange for the 280zx turbo R200 has a wider bolt spacing than the flanges found on 200sx turbo R200s and normally aspirated R200 280zx cars. I changed the 3.90 R200 out in my first generation maxima for a 3.54 out of a 280zx turbo and had to swap the flange. Though the maxima didn't come with R200, it bolts right in if you use a 200sx turbo differential mount. Link to comment Share on other sites More sharing options...
80LS1T Posted May 9, 2008 Share Posted May 9, 2008 Ok I have read this whole thread but I didn't find what I was looking for. Do the 280ZXT rear axles slide right into a 300ZXT 3.7 LSD diff? Is the spline count and length the same? If I missed this in the thread somewhere just tell me! Thanks! Guy Link to comment Share on other sites More sharing options...
JMortensen Posted May 9, 2008 Author Share Posted May 9, 2008 Ok I have read this whole thread but I didn't find what I was looking for. Do the 280ZXT rear axles slide right into a 300ZXT 3.7 LSD diff? Is the spline count and length the same? If I missed this in the thread somewhere just tell me! Yes they do. Link to comment Share on other sites More sharing options...
kiwi303 Posted May 21, 2008 Share Posted May 21, 2008 I'm just going to make an assumption that the 280ZX N/A falls into Longnose R200 territory ? Yes. Fixed the info to include the S130. Ok, so from that, my '78 Fairlady 280Z (USA knows them as 280ZX, mine Jap Domestic market) should be a longnose R200 How do I confirm that from exterior details? Are there stampings or markings on the diff/gears that allow you to identify which differential is in your car? I'd quite like to know too Link to comment Share on other sites More sharing options...
ktm Posted May 24, 2008 Share Posted May 24, 2008 That is an R200 long nose. The 280zx's do not use a moustache bar like the S30s as can be seen in the photo. The best way to "visually" identify an R200 versus R180 is the measure the pumpkin or cover. The R200 is quite a bit larger and is more "round" (height and width are similar); the R180 pumpkin/cover is more "elliptical" (it is taller than wider). The only way to tell what gears are in the differential is to open the rear cover and look for a marking stamp on the ring gear. For instance, 39:11 would be 39/11 = 3.54, 39:10 = 3.90, 37:10 = 3.70, 37:11 = 3.36. A less accurate way would be to spin the driveshaft and then count the revolutions of the driveshaft relative to the revolutions of the rear wheels. For a 3.54 differential, every 3.54 revolutions of the driveshaft result in 1 revolution of the rear wheels. Link to comment Share on other sites More sharing options...
ShaggyZ Posted May 24, 2008 Share Posted May 24, 2008 The only way to tell what gears are in the differential is to open the rear cover and look for a marking stamp on the ring gear. For instance, 39:11 would be 39/11 = 3.54, 39:10 = 3.90, 37:10 = 3.70, 37:11 = 3.36.Or, 41:13 = 3.15 in my case A less accurate way would be to spin the driveshaft and then count the revolutions of the driveshaft relative to the revolutions of the rear wheels. For a 3.54 differential, every 3.54 revolutions of the driveshaft result in 1 revolution of the rear wheels. I don't mean to be picky (but I am), but it would technically be more accurate to do it this way versus merely trusting the numbers. I only say that because some gears could be misstamped. Of course, you'd need to have a pretty precise way to measure it - that shouldn't be too hard. Link to comment Share on other sites More sharing options...
johnc Posted May 24, 2008 Share Posted May 24, 2008 Sorry, the spin and count method isn't accurate either. Per Einstien's theory of Special Relativity you get length contraction when any mass is in motion. You need to adjust with your measuring tools because length contraction affects the starting point and the ending point of the spinning masses. Personally I would rely on the stamped numbers on the ring gear just to avoid relativity issues. Link to comment Share on other sites More sharing options...
z-ya Posted May 25, 2008 Share Posted May 25, 2008 Personally I would rely on the stamped numbers on the ring gear just to avoid relativity issues. Good one ... Counting teeth works if you don't believe the numbers on the ring gear. Link to comment Share on other sites More sharing options...
kiwi303 Posted May 25, 2008 Share Posted May 25, 2008 I prefer In-Steins theory of special relationality. "The more steins of alcohol consumed, the closer your drinking buddies become, until at saturation point blood brotherhood ensues" Link to comment Share on other sites More sharing options...
Guest xyzalvarez Posted May 26, 2008 Share Posted May 26, 2008 good info! booked* Link to comment Share on other sites More sharing options...
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