So since i’m working on the R180 diff, a some nice people pointed out that there’s a special Service manual for this. Luckily one was available for sale just that time, along with another book which i saw recently and was missing in my 240Z reading collection: The differential service guide is an Datsun USA made service manual for various R- and H- Differentials by Datsun and is brilliant. It explains the working priciple, the differences of the manuals and obviously, the service. it comes with calculation tables for settings and a lot of background information about the various diff. It’s basically an englisih translation of the original Nissan JP…