Nismo GT Pro Lsd

[MADMIKE]

So I picked up an S13 Short Nose while I was on vacation in Cali for New Years. The PO stated that the Diff was a GT PRO. I cracked the thing apart yesterday and I am unable to locate any identifying numbers on this thing. It looks like the GT/GT Pro CLSD case. I have not opened the guts of it yet to count discs and what not. Anyone know where I can find a breakdown diagram or Service manual for these things.

The manufacturing quality on it is very nice so I don't believe this is a knock off, though I could be wrong.
Pics
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-ash3/s720x720/541212_3311836189680_1081393025_2850080_1494316529 _n.jpg

http://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash3/s720x720/535456_3311835709668_1081393025_2850079_78220224_n .jpg

Drivers side
http://a4.sphotos.ak.fbcdn.net/hphotos-ak-ash3/s720x720/562003_3311836709693_1081393025_2850081_1798002822 _n.jpg

Passenger side does have 19mm nut, though I cant budge it while it is out of the car.
http://sphotos.xx.fbcdn.net/hphotos-prn1/s720x720/524719_3311845149904_1081393025_2850087_1039596423 _n.jpg

Lastly how do decipher if it is a 2way as advertised or 1.5way. I bought it for super cheap so I am not too worried if it turns out to be bunk...

Thanks again

[MADMIKE]

Really nobody has worked with one of these diffs?

[wawazat8402]

The article below will help explain identifying the cams to determine lockup characteristics. Im not familiar with the Nismo diffs to help you confirm that is what it is though. Check page 2 in the link below.

Project NSX Part 2, Tuning a Limited Slip Differential; Tricks of the Pros (http://www.motoiq.com/magazine_articles/id/1322/project-nsx-part-2-tuning-a-limited-slip-differential.aspx)