In this video I'm restoring the differential from the Datsun 240Z. I started to disassembly the R180 differential, when I quickly realized that it has the longest available ratio with 37:11. Which is 3.36 turns from the drive shaft and one turn on the wheel. Since I'm upgrading the transmission from a four speed to a five speed I definitely need a shorter ratio. I was able to buy a 39:10 (3.9) ratio from a Swiss 240Z. It already looked in much rougher condition from the outside and it also showe