Chain Drive Diff

The differential is a tricky item on a chain-driven BEC. In this video, I replace the crown wheel on an Audi A6 Quattro rear differential* with a motorcycle sprocket, fit plummer block bearings and mount inboard rear disc rotors.
*(Diff scavenged from a wreckers' yard. It's an open diff as I don't think an LSD is necessary for my 'dry weather lightweight BEC' application).
Credit - the Master
What's Going On In Doug's Shed "How to Build a Simple MX5 Chain Drive Differential - No Machining, No Welding" • How to Build a Simple ...
Music Credit:
Doctor Turtle - Beaconsfield Villas Stomp, CCBY
Andy G. Cohen - Through The Lens, CCBY
Free Music Archive, freemusicarchive.org

[@garyyorke1080]

Just found this video and subscribed as I found it very normal in human speak lol.... No BS or over explained how to just this or that is happening . Simple explanation and shots how and why . If I'm correct is the lathe a southbend . Makes a nice change seeing an older lathe not a huge industrial level item . Will work through your playlist later . Thanks for sharing

[@Stu718]

Hi Gary. Thanks. The lathe is a hercus, which is an Aussie copy of a southbend . There's a video of it on the playlist. The videos document my build, and I try to keep the BS down. Cheers stu

[@johnlockesghost5592]

This is exactly the set-up I need for my Toro 12-32 riding lawn mower, as long as I can get a limited slip unit. Love the old lathe, I have a Hendy cone head from the mid 1920's.

[@Stu718]

Hi , I would've gone for a torsion LSD, but was limited to vehicles in stock in the pull a part wreckers. The old Hercus lathe has proved its worth numerous times on this build.

[@javierandrade7756]

Excelente trabajo e idea, muchas gracias!

[@Stu718]

Gracias

[@lesliesemrau9826]

Lots of work and it looks nice. Regards.

[@Stu718]

Thanks Leslie, let's hope it works in practice

[@coordinatedcontrol503]

Dude this is amazing

[@Stu718]

Hi, thank you. It's yet to be proven on the track... Later this year I hope

[@stovepipe666]

Nice job well done

[@Stu718]

Thank you. The real test will be whether it's vibration free at road speed

[@wr30025728]

Hello! I'd sure like to talk with you about this! I am going to build a go-kart and this is the best idea I have found for putting a differential in it replacing the solid axle.

[@Stu718]

Hi thanks , have you seen kzbin.info/www/bejne/bonMYWeZadStnZo ,. Doug has the best ideas and explanation. My diff has yet to be tested and Im worried about vibration, fingers crossed. Much easier if no inboard brakes. I'm happy to answer your questions via this comments thread cheers stu

[@nordicweiss]

How does the grease hold up compared to conventional gear oil.

[@Stu718]

Hi. It's yet to run in anger. I'm optimistic as there is no crown wheel to lube. The spider gears only have work to do when the car is in a corner. And of course the whole unit will only operate for maybe 5000k in its whole life. I'll report as things go along. I'm currently working on the body and have been lax in my video updates Cheers Stu

[@nordicweiss]

⁠thx. I’ve seen others use grease vs oil. I’m building one for a brake steering snowcat so will have plenty of energy going to spider gears when turning.

[@T0tenkampf]

Did Doug see you in his garage? ;)

[@Stu718]

Doug is the master

[@kingman2362]

From what car that??

[@Stu718]

Hi It's from an Audi Allroad. Cheers

[@kingman2362]

@@Stu718 thank you very much you very kind

[@docokd7oco443]

Fix your audio - can't hear a word said.

[@Stu718]

Alas, I'm more into my workshop than my videos. Sorry