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With permission granted from the SAU admin (thanks Christian!) I'd like to introduce a new website "OEM Soko" (OEM -> Original Equipment Manufacturer, Soko -> Warehouse) https://www.oemsoko.co.jp/ It's a family business registered in Japan and owned by my wife (Japanese) with myself running the website and shipping side and doing all the English translations/dealing with clients in English. My son is also involved part time while studying. The business has been registered since 2016 but never promoted outside Japan until now due to other obligations. So what service does OEM Soko offer? In a nutshell: Anything worth shipping from Japan via Japan Post EMS. It's primary focus is Automotive accessories and hobby related items such as model cars etc, however there's also a "Vintage Soko" section dealing with used items and categories like Car cleaning and Tools. There's also a category "Nifty items" which includes any items we come across that are a) made in Japan, and b) have some sort of "nifty" attribute. By all means please take a look and let me know your thoughts or any feedback here in this thread. We're updating the products all the time and although it's not 'populated' so much at this stage, by checking up on what's new I'm sure there'll be something to pique your interest! * As an introductory offer to SAU members we'll throw in a "Car Wash Japan" Made in Japan 30cm x 30cm microfiber cloth with any order regardless of value! Just put your SAU member name and a link to your SAU profile in the "Order special instructions" section in the Shopping Cart (see attached image) to receive this free gift! 🙂👍 We're always open to any request for items from Japan no matter what it is, automotive related or not, so by all means please use the Contact form to send your request here! : https://www.oemsoko.co.jp/pages/contact -
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I have S15 helical too. It is a bit worn. I think the drive behaviour you describe is related to this wear. Wear of helicals is something that no-one seems to have paid a lot of attention to, but now that they (as in original Nissan ones) are all a bit old - we're starting to see the consequences. The ends of the helical spurs wear into the casing. That's where they perform the braking that diverts torque. Some of the more modern helical designs have proper wear surfaces introduced there, but the Nissan ones are just steel on steel (or iron). -
I've had a range of rear diff centres - open, viscous, helical, mechanical, welded, etc. I can't go past a refreshed factory 32 gtr centre for consistent lock and street driving. The next step up for me would be the nismo 1.5 way , which likely suits you better as track sounds like the focus. Will chatter in carparks but its not the worst. I have never tried a quaife rear diff, an option I've looked at before and might be one for you ..... Currently playing with an S15 centre at the moment and I hate it. The transition from single wheel spin either side is just weird. -
Honestly, I did think the PDM could do it and thought Haltech told me the pump didn’t like it. But after re-reading the emails and comments above, I clearly misunderstood lol.
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