Welcome • User Guide
ToS • Privacy • Canary
Donate • Bugs • License

©2026 Poal.co

Description:

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 showed a lot of wear on the inside. The pinion and ring gear looked perfectly fine though. Therefore I decided to also disassemble my 3.36 diff. I quickly noticed that all components are in much better condition, so I made the decision to only use the ring gear and pinion from the 3.9 diff and put that into mine. The swap was straight forward and since I installed all new bearings I needed to re-shim it all anyway. I haven't shown any of that in the video, but a lot of measuring, calculating and trial and error was needed to have the diff properly back together. After finishing the diff, it was time to install the rear axle back together on the car. Before I could do that I needed to install a bunch of stuff to the chassis first. I restored all these components off camera to save time. I restored the fuel and brake lines, hand brake mechanism, pedal box, diff belt, brake master cylinder, clutch cylinder, brake switch and brake proportioner. The whole reassemble went pretty smooth. The car is now finally standing back on its own wheels since I started to disassemble it back in May 2023. I think it really looks amazing and I can't wait to further put it back together. Next big step on the list will be the engine and transmission restoration.

Stay tuned.

I also want to say a huge thanks to DCW Classic from Lithuania. He's such an immense help with this project. His huge experience and knowledge is very helpful. I also want to say thanks to Mister patina for the powder coating, S30.World for the firewall insulation and the hand brake cable, KW Suspension for the nice coilovers and the black springs.

Description: >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 showed a lot of wear on the inside. The pinion and ring gear looked perfectly fine though. Therefore I decided to also disassemble my 3.36 diff. I quickly noticed that all components are in much better condition, so I made the decision to only use the ring gear and pinion from the 3.9 diff and put that into mine. The swap was straight forward and since I installed all new bearings I needed to re-shim it all anyway. I haven't shown any of that in the video, but a lot of measuring, calculating and trial and error was needed to have the diff properly back together. After finishing the diff, it was time to install the rear axle back together on the car. Before I could do that I needed to install a bunch of stuff to the chassis first. I restored all these components off camera to save time. I restored the fuel and brake lines, hand brake mechanism, pedal box, diff belt, brake master cylinder, clutch cylinder, brake switch and brake proportioner. The whole reassemble went pretty smooth. The car is now finally standing back on its own wheels since I started to disassemble it back in May 2023. I think it really looks amazing and I can't wait to further put it back together. Next big step on the list will be the engine and transmission restoration. > Stay tuned. > I also want to say a huge thanks to DCW Classic from Lithuania. He's such an immense help with this project. His huge experience and knowledge is very helpful. I also want to say thanks to Mister patina for the powder coating, S30.World for the firewall insulation and the hand brake cable, KW Suspension for the nice coilovers and the black springs.

(post is archived)

[–] • 1 pt

Thanks for posting this. So I remember to go back since I don’t live on or log into jewtube. But I know it’s out to watch. Thank you fine internet friend.