Luzifer Posted August 7 Share Posted August 7 As the title says, I'm trying to figure out what diff and LSD are in my 74 Datsun 260Z. The previous owner said it's an R180 LSD but he doesn't know any more than that. It has a 37:11 stamped on the ring gear and mechanic confirmed it's an LSD but he doesn't know anything else. The top of the case appears to have some numbers stamped (whether that helps or not) 8311 E4600 *maybe. I bought new CV axles from T3 to install but it doesn't have the standard 4 bolt diff stubs. Trying to see if I can swap some stubs in to work with the new axles. IMG_8625.HEIC IMG_8631.HEIC IMG_8638.HEIC Quote Link to comment Share on other sites More sharing options...
madkaw Posted August 9 Share Posted August 9 The casings are exactly the same for the Nissan and Subbie units . The stub axles would look a little different than the stock ones . The Nissan units the stub axle will have a bolt holding it in place where the Subbie units just snap in . Ratio can be figured by just marking and rotating the assemble and counting the ratio difference Quote Link to comment Share on other sites More sharing options...
jhm Posted August 9 Share Posted August 9 For starters, if you haven't already seen this FAQ thread, it may be of interest to you: https://forums.hybridz.org/topic/49194-differential-cv-lsd-hp-torque-r160-r180-r200-r230-diff-mount/#comments As madkaw pointed out, the casings are the same; but IIRC, the rear covers are different. The Subaru unit has an electrical plug/temp sensor on the differential cover where the Datsun fill plug is. Your pictures didn't display the rear cover, so check that first. Also, need to clarify what stub axles you have as madkaw explained, especially if you're wanting to convert from the stock half-shafts to aftermarket CV units. Did a quick Google search on your casing number, but the results didn't really indicate anything definitive. It is similar, but not an exact match, to a Nissan part number: https://www.nissanpartsdeal.com/parts/nissan-housing-final~38311-e4600.html If the diff is a Subaru unit, this is a super useful thread: https://forums.nasioc.com/forums/showthread.php?t=2597453 From your second and third photos, it *appears* that you have a 3.36 CLSD diff. The car looks like it's built with some nice pieces, so good luck with it and have fun! Quote Link to comment Share on other sites More sharing options...
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