Jeff Berk

If you move the sub woofer under the driver seat you can feel the music even if you cannot hear it over the exhaust.

I just got mine to fit. I didn't need to grind off nearly as much as InLine6 did on the gear side and on the other side, I just needed to grind a little off of two spots on the 1/2 shaft opening so that the LSD carrier could make the turn. Now it easily falls into place. I'm surprised that an LSD designed to fit a specific case will not fit unless you alter the case. Hopefully since I chickened out of replacing the pinion bearings, I won't have a shimming issue. I attached a shop drawing of the KAAZ DAN2020 LSD and I was wondering if it is smaller than the Quaife unit. Jeff

Thanks GK I'll give it a try.

I don't want to hijack the other thread on a R180 LSD installation. I have two photos attached on an LSD being installed. One from the internet from a Subaru that shows it just goes in nose first, is turned with two fingers, and slides into place. The other one is of my KAAZ LSD going in nose first and not moving beyond that position. The Subaru was replacing an LSD with another LSD while mine has never had an LSD. The ring gear almost clear the side of the housing. Are there any tips on what I need to do other than keep at it?

I like the door hinge. In 2020 I had to fit a new hinge in my glove box and used this because I didn't know Skillard made these: https://www.mcmaster.com/1588A742/

This is an aside for those installing an LSD in their R180. It came to my attention that R180 ring gears were provided in 110 and 115 mm IDs in the US. The KAAZ model DBN2020 LSD that I purchased was designed for the 115mm. I had to enlarge my 110 ring gear so it would fit on the KAAZ. It took me an hour to mount the ring gear perpendicular to the lathe axis and another hour to carve out about 5mm. The ring gear is incredibly hard steel. Lucky for me there was a knowledgeable machinist available to help me.

This is an amazing project I'm glad I didn't attempt. I have two potential avenues of assistance if you need either one. My fall back mechanic for my Z, Lanny Ritz in Kent, OH can handle just about any issue with a Nissan, except he doesn't do differentials. I can get you the contact information he ships his differentials to if you get into a real bind. If you need help cutting out a shim, I have access to a water jet. You would just have to ship me the stock.

How many years until you can call them NOS (New Old Stock)?

Your machinist's comment about tolerances might explain why when I tinker around at a machine shop at the university, I'm forced to convert all my projects to inches from metric. This thread has convinced me NOT to pull out the pinion on my LSD upgrade. All this trouble just to get the right shim is not worth it.

You are a few weeks ahead of me. I couldn't find anything on the internet about rebuilding a R180 so I was using the instructions for a R200 at: Like you, he also used gear marking compound. I purchased a KAAS 1.5 LSD and it just shipped last night from RHDJapan.com (model DBN2020SQ). I'm reluctant to remove the pinion shaft because I'm not sure I can get the lash correct when I reinstall it with new bearings. I'm looking forward to how it goes with your build. Please keep us updated.

If you contract with an upholsterer, you can select just about any fabric you like. Or, if you are like me and have your heart set on a specific pattern, take this as an opportunity to learn upholstery. I'm doing that with leather so I can cover my dashboard.

I went with leather and I'm happy with that. Otherwise, I'd suggest finding an upholsterer to create a new cover.

I think zKars is right. It's hard to say where the differential came from because the R180 was switched out with an R200 in the early 1980's but some time after that, it must of got switched back to an R180.

I'm trying to determine the gear ratio on my R180. There is a number on the ring gear of ?? x 394 Does this mean 3.94:1 ? Should I just see how many turns of the differential input is required to make a full revolution of the ring gear? Can anyone assist in decoding this? Jeff

Thank you

Thanks all. I'll check to make sure the 1/2 shafts are operating smoothly and if not, I'll dive into rebuilding them.

I'm removing my differential to install a LSD*. While at it, I was looking to see if I need to address anything else in this 49-year old car. I've seen detailed videos on rebuilding half shafts and was wondering what could possibly require rebuilding on them since there is so little movement this component needs to experience. The universal joints appear to be fine so far. *BTW: I decided to go with a KAAZ unit because I like their technical support, ability to adjust (although not easily) and I found a great price including shipping if I order them from a Japan-based vendor. Jeff

Has there been any updates on this project since May?

OK, not prefect but close. I'll post the obj file tomorrow if anyone wants to make one or two. I printed it in PLA, sanded it, sprayed it with a few layers of gloss, then stretched chrome vinyl film over it. I will print the next one in ABS because this one warped a little when I heated up the vinyl wrap to stretch it. The photo shows the original one in my hand and the printed one installed. It looks like a chip is missing in the printed one but that's just some strange reflection.

Well, if you think you might need a hitch, go for it. I don't think I can afford a drive all the way to AZ for this. I suspect it should be almost exactly what is on a 240z.

I think its an April '74 (VIN RLS30019158). My Z spent much of its early life in AZ with an previous owner.

I was looking into installing a hitch to tow a support trailer for Auto-X and checked with U-haul and got a strange response that I cannot act upon since I live in Ohio.

The OBX LSD ebay listing indicates that it fits the 84 to 89 300ZX. As far as I can tell, I have a R200 out of a 280zx so it should NOT fit my differential. But, from what I read in a posting here on ClassicZ is that the difference between 84 to 89 R200's and the 75-83 R200's is that the 75-83 R200s used a ring gear bolted to the carrier with 10mm bolts while the ’84-89 used 12mm bolts. In the video by Stewart Motoring, he had used bushings to fit the 10mm bolts into the 12mm holes. Does that mean that all I need to do is purchase the same bushings he did from McMaster Carr and that will adapt the LSD to my ring gear? I'm assuming that I can retain my existing side shafts or half shafts (whatever they are called) between the rear wheels and differential. NEW TWIST: The vendor shows the OBX unit is out of stock but he has MHP LSDs at the same price.

Going back to the LSD option, I found this OBX on e-bay from what looks like an authorized dealer. https://www.ebay.com/itm/185599652068?fits=Make%3ANissan&hash=item2b3699f0e4:g:vqgAAOSwhrFjNjda&amdata=enc%3AAQAIAAAA4MIe6Uoer6SZ0hsN5krJSbV4iFzg4hk%2BAWSrQNuI663pte0VClGAiTftyVKD9QBBi5zpeWVgyuK7X8d5qM%2FvG4Fo2gXX2RUObNdHtG7D73Mo9nfI0dJ%2Byd593rpBfvqSsa06fVSNP9akt2sG6CZD7DFkwHTKIkLlpH1aKehC0cNbptijaXZ0q2oTs7O8rOM1knezPhA2heLZqUcojkWuFCv528k9hwvcmaAXmIzBdy8Glh3gTCT%2FOHue2Fql5GMDzkHZlZnI6Rfj5h2XZdh9jjET%2B9q3StxSl37CyBSmwgLf|tkp%3ABFBMhuTRzfZi I think my differential is an R200 out of a 280zx so I'm assuming this unit will work. I understand that I'll need some ancillary parts like shims, but I can use my existing axles. I've been reviewing the following youtube video which seems informative (how did we survive pre-youtube?).

I've never touched the castor and camber, just the toe in using a tape measure and two aluminum plates. I'll need to read up on the other two adjustments.