Leon Posted December 29, 2023 Author Share Posted December 29, 2023 15 hours ago, inline6 said: Well done! I like "After tireless and borderline obsessive searching..." That describes me more days of a week than not. I haven't been very active on Hybridz.org for several years, but have been restoring a 240z for 5 years now and that has required a lot of tireless and borderline obsessive searching. Thanks Garrett! I bet many can relate. But I know you especially have been focusing on every single detail, any idea when you'll be back on the road? Between family, work, and other projects, it's difficult to dedicate the time like I used to. But after all these years, I still love this car. This Z will be 50 years old in a couple months and it amazes me what this 50 year old car can do. 🤙 Quote Link to comment Share on other sites More sharing options...
Leon Posted December 29, 2023 Author Share Posted December 29, 2023 16 hours ago, AydinZ71 said: Hi! I thought the clutched STI 3.9:1 LSD was available in the years 05-07’? Meh, minor detail. Was just curious if my recollection is wrong. Maybe that’s just the US models. keep in mind, now that you have your LSD carrier and stub axles, you can swap out the carrier to different r180 with whatever ring/pinion ratio you like. Sounds like you will be happy with the 3.9, so you’re all set. Just nice to know you have options. I swapped my helical STI LSD carrier into a 4.11 for track purposes. im not sure how often the clutched carriers need to be inspected or the clutches replaced, but not a bad idea to do it now before you seal her back up. I have never had a clutched LSD myself, but I know the competitive S30 road racers prefer it. Hey Aydin, in the US, the 3.9 was '04-'05 only unfortunately. The '06 was unique in that it was a CLSD 3.54--'07 and later were all helical 3.54. Good thinking! I'm planning on inspecting the carrier and replacing clutches once the diff arrives. I had ordered fresh clutches from Racing Diffs with the thought that I was going to refresh my current diff but now they can be used for the Subi unit. Speaking of which, the diff has now arrived from the dismantler and is in Tyler's hands. He has gone the extra mile to pull the cover and take plenty of pics to confirm that it's indeed a 3.9 CLSD. ❤️ It'll be shipped out from Japan after New Years so hopefully in my hands in a few weeks! 1 Quote Link to comment Share on other sites More sharing options...
inline6 Posted December 29, 2023 Share Posted December 29, 2023 6 hours ago, Leon said: Thanks Garrett! I bet many can relate. But I know you especially have been focusing on every single detail, any idea when you'll be back on the road? I think I can get it finished by the end of March. We shall see. I pretty much underestimate the amount of time to do anything by a lot. Quote Link to comment Share on other sites More sharing options...
heyitsrama Posted December 30, 2023 Share Posted December 30, 2023 Does the spline count for the new diff match the Kameari stubs? Quote Link to comment Share on other sites More sharing options...
Leon Posted December 31, 2023 Author Share Posted December 31, 2023 On 12/29/2023 at 7:30 AM, inline6 said: I think I can get it finished by the end of March. We shall see. I pretty much underestimate the amount of time to do anything by a lot. I gave up trying to estimate completion dates long ago. In Soviet Russia, project completes you. 🙃 Quote Link to comment Share on other sites More sharing options...
Leon Posted December 31, 2023 Author Share Posted December 31, 2023 On 12/29/2023 at 11:04 PM, heyitsrama said: Does the spline count for the new diff match the Kameari stubs? Man I sure hope so... the research I've done seems to indicate that they match but I can't say I found anything 100% conclusive on this. We shall see. Quote Link to comment Share on other sites More sharing options...
Leon Posted January 20 Author Share Posted January 20 (edited) On 12/31/2023 at 10:12 AM, Leon said: Man I sure hope so... the research I've done seems to indicate that they match but I can't say I found anything 100% conclusive on this. We shall see. The diff arrived this past Tuesday and I confirmed that the stub axles fit! I'm awaiting my pinion and side seals to arrive next week. In the meantime, I'll clean up and paint the diff and then it's install time. I've decided to install it as-is and only fit new clutches into the diff if I feel like it's needed. I bought bolts for the rear cover from ZCar Depot instead of fitting studs. I'm assuming this won't be the last time I pull this diff so I'm hoping that this makes the process easier. Edited January 20 by Leon Copy/paste from Google Photos doesn't seem to work... Quote Link to comment Share on other sites More sharing options...
Leon Posted March 15 Author Share Posted March 15 Finally had a chance to degrease the diff, reseal every joint, and pop in the Kameari stubs. I torqued the pinion nut to 135 ft-lb per this nifty blog article: https://inzane240.blogspot.com/2014/01/updated-info-on-subie-r180-install.html. Planned install is this Saturday! I've also ordered W65 idle jets from Keith Franck so hoping to have this car fairly dialed in for a mountain drive on the following Saturday. Quote Link to comment Share on other sites More sharing options...
Leon Posted March 19 Author Share Posted March 19 She's back on the road as of this past Saturday, as promised. I forgot how much of a pain it is to do a job like this on the driveway, but it ended with a driving car and a diff that feels better than ever! No more clunking and... a bit less whining. It seems the poly mustache bar bushes transmit a lot of whine, as the front diff mount is still OEM. Somehow though, the exhaust ended up a lot closer to the diff than I recall. The lack of clearance is audible. I'm planning to drop the exhaust and grind down the diff case. Other than that, she needs new tires, fresh engine and gearbox oil, and Keith's W65 jets need install and tuning. Oh, and I found that the rear ARB was clashing with the left RLCA. Since both RLCAs are the same part number, just flipped LH/RH, there is less clearance for the ARB on the left vs right sides due to the flange being on the topside of the arm. This will need some massaging. I'm afraid that by the time I'm "finished", the car will need another restoration. 😄 Quote Link to comment Share on other sites More sharing options...
Zetsaz Posted March 22 Share Posted March 22 I ground down that same section of the diff. Don't think it should cause you any issues Quote Link to comment Share on other sites More sharing options...
Leon Posted April 29 Author Share Posted April 29 (edited) On 3/22/2024 at 9:22 AM, Zetsaz said: I ground down that same section of the diff. Don't think it should cause you any issues Agreed! I did this about a week ago, no more exhaust rattling on the diff. I've also filled the transmission with AC Delco GM friction-modified synchromesh gear oil, as recommended by the internet. I need to put some hard miles on the car to see if it helps smooth out the shifts a bit, namely, aggressive 4-3 downshifts had been a bit scratchy if not done patiently. I've also installed Keith Franck's W65 jets in place of the W60's. Tractability is now near-perfect, fantastic throttle response with surprisingly good fuel economy. I'm wondering whether this engine is better suited to yet another step up in size to W70 but I'd like to put some more miles on this setup. I'd love to finally fit those new OER's I bought a while back but there's a good chunk of work to do before that happens. Namely, port-matching and pinning the manifold as well as Rebello did with the TWM. With the Webers working quite well, I'm not feeling the most urgent motivation on this... Then there's the adjustable cam gear to install, ensure no valve-piston issues, and go have another tuning session. Step-by-step, I'm getting ever closer to where I've been wanting the car to be! Edited May 2 by Leon updated photos Quote Link to comment Share on other sites More sharing options...
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