Development of the Differential Gear - straightforward video

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DavidG
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Development of the Differential Gear - straightforward video

Postby DavidG » Tue Jan 01, 2013 8:45 am

I ran across this on youtube and had to share. I've never been entirely clear on how, exactly, a rear differential does its job. No longer!
A video from 1930s Chevrolet, showing the conceptual development of the differential.



Also, I had no idea that early cars were ONE wheel drive. Well, there wasn't a differential yet!

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Re: Development of the Differential Gear - straightforward v

Postby John *.?-!.* cub owner » Tue Jan 01, 2013 10:55 am

Thanks David, I knew the basis of how a differential worked, that that is a very good explanation of it.
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Re: Development of the Differential Gear - straightforward v

Postby Bob McCarty » Tue Jan 01, 2013 11:43 am

I wonder if they got a couple of log rollers to run on the tires at the end.

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Re: Development of the Differential Gear - straightforward v

Postby Boss Hog » Tue Jan 01, 2013 1:17 pm

nice
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Re: Development of the Differential Gear - straightforward v

Postby Jim Becker » Tue Jan 01, 2013 1:49 pm

DavidG wrote:Also, I had no idea that early cars were ONE wheel drive. Well, there wasn't a differential yet!

The differential dates back at least to the early days of steam propulsion. I doubt that many producton cars were one-wheel drive. I imagine there were experimental cars built that way.

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Re: Development of the Differential Gear - straightforward v

Postby Winfield Dave » Tue Jan 01, 2013 6:56 pm

John *.?-!.* cub owner wrote:Thanks David, I knew the basis of how a differential worked, that that is a very good explanation of it.
:Dito: :Dito: Thanks !! :D
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Re: Development of the Differential Gear - straightforward v

Postby Gary Dotson » Wed Jan 02, 2013 7:40 am

I agree with John, although I've worked with them most of my life, I would have never thought to explain them with sticks. Got to love those old training videos! Thanks, David!

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Re: Development of the Differential Gear - straightforward v

Postby beaconlight » Wed Jan 02, 2013 8:05 am

OK I get that now. Is there some thing like this to explain "Posi traction"?
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Re: Development of the Differential Gear - straightforward v

Postby Gary Dotson » Wed Jan 02, 2013 8:25 am

Bill, there are variations on the design, along with a lot of different names for them, but most are simply a slip clutch, on the axle shaft gears that create resistance for the differential to function as it does in the video.

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Re: Development of the Differential Gear - straightforward v

Postby Jim Becker » Wed Jan 02, 2013 11:40 am

Here is one on the Eaton locking differential that GM uses. It is one of the more complicated designs. You may have to watch it more than once.


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Re: Development of the Differential Gear - straightforward v

Postby beaconlight » Wed Jan 02, 2013 1:04 pm

Thanks Jim and Gary
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Re: Development of the Differential Gear - straightforward v

Postby Gary Dotson » Thu Jan 03, 2013 8:23 am

Jim, thanks for posting that video. Yes, that is one of the more complex units out there. They work well and I've never had the need to repair one, so I found the video very informative. I guess I was over simplifying the question but I'm not much on giving long winded answers. There are also a couple of gear style limited slips out there but we would for sure need videos to explain those things.


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