Filthy Datsun 240Z Differential

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. I hope you like my work and enjoy the video. Huge thank you to all of my Patreon supporters and especially to: Aaron White Adel AlSaffar August Kupfer Ben Burns Bill Baith Sigoss Family Bold Cheddar Brenna Redpath Chris Ulivarri Clint Fisher Dane Prince Derilas Edward Conway Jim Wasko John Shebanow Joseph Kamps Josh Ledford Joshua Scher Kar Keith McComb Kerem Yollu Kyle O'Keefe Lambda GPU Workstations Marcus H. Mark Tesmer Michael Fleisher Mo B Nick Houston NoLoneSurvivor Peter Cyprian Peter Pearson R.A. ReddDirt Scott Tomlin Shao Zhang Stefano Di Biase Stuart Tyler Carruth Vickie Bligh Vince Valenti Yale Baker Albert Siemers Alex Manning Alexander Hasselbach Andre Andreas Andrey Anthony Apellido Anton Pchelkin Arni Bjorgvinsson Ben Humphrey Ben Simmonds Benny Bonnie Williamson Brian Hoerl Caleb Betczynski Chad Bryant Charles D Chris Faehl Chris Visscher Chris Walter Christian Fjelldal Christopher Lobay Crystal Cash Cyril Damien Fuller-Sutherland Daniel Varga Dave Hardware David Lehnus David P Hruska David Thompson Derson Jacomini Dustin Davis Eddie Erik Nordby Ethan Mc Gareth Rimmer H D Hakan Uzunoglu Ivan Eugenio Jack Curry JacopoBello James Hare Jesus Fernandez Cortes Joseph Coates Justin Miller Kiro Ivanovski L0XIS Labradog Laurent Bolli Lil' Brummbino Marc Cerisier Mary Casella Matteo Capo Matthew Johnson MDC Michał Święcki Mihai Norbert Spaar Oleksandr Pat Nakajima Raoul Kriesi repülő búgás Roan Fryer Robert Landrum Rupert Purcat Sam Sarah B. Scott Brooks Scott Marshall Sean Sands Spencer Kormos Stanley Dimant Stefan Heymanns Steve McVicker Svenja Kuckla Thanny Tim Holt Timofey Lychik TLeaf Trevor Kam Tucker Ifft William Максим Гусев Sorry for my bad english, it's not my language. I try my best to improve my technical english. Thank you for watching :-) „I make a new one“ T-Shirts: https://teespring.com/stores/my-mechanics My Second Channel: https://www.youtube.com/c/mymechanicsinsights My Patreon Page: https://www.patreon.com/mymechanics

Added 2 Apr 2026