Was browsing and I found this: https://www.tractionconcepts.com/200.../tcxin6533.htm
Apparently you can convert the OEM open diff to a locking LSD with this $350 part.
Anyone tried this? I had always considered a real LSD far out of my price range but this is interesting.

 

Ill check it out in the morning, interesting idea.

 

I know these have been around forever in the civic world. Some people say they suck, others have said they used em in racing and worked well. Also https://www.ebay.com/itm/Datsun-240Z-280Z-300Z-350Z-370Z-R200-Limited-Slip-Differential-Grip-Kit-LSD-/323251256873?nav=SEARCH
Seems like a really easy part to reverse engineer so might be a good candidate for an eBay part...

 

First off they do work, they just slide between the ring gear and the opposite shaft gear and are held in place with the spider gear pin. They work by providing friction between those two gears, the PROBLEM is you generate a lot of heat and friction on a part that was never really designed for it in the first place so you need to change your differential oil a LOT more frequently (about every 10k) and those spring block inserts only last 50k miles if you're driving normally or about 10k if you're using them really hard like track use. They don't work as well as the factory VLSD, if I had to just pull a number out of my butt I'd say they transfer about 15% power to the other wheel, this is all determined by how strong the springs are in the kit and the ones I've seen in the past you could easily block one wheel and still turn the other, it just provided some resistance, theoretically with very strong springs you could make the differential completely locked though. I have no idea how stiff the springs are in that kit.

Since the factory VLSD is available for this vehicle I would go that route instead of a spring block insert, the VLSD lasts a LOT longer under normal driving and doesn't cause excess wear on the gear, if you need something for track use just toss in a real LSD because you'll need the longevity.

I would NEVER pay what they're asking for that part though, it's nothing more than 2 blocks of metal with 4 springs between it and the ones I saw were less than $100. Be aware that you will end up with premature parts wear inside the differential.

 

Yuck, forget that. I wonder why they don't put a layer of friction material on the top and bottom of that plate to avoid the metal on metal and allow stronger springs for more locking.

 

More friction = more heat and faster wear. Every time you go around a corner they're slipping and causing friction. Granted it's also washing around in the gear oil, if I was to ever run one of them on the G I would definitely throw on a finned differential cover to help dissipate heat.