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7/13/2013 11:09:30 AM EDT
This is explained so well even an idiot like me understands it.  

Skip to 1:50 to begin the explanation.

Video Link
7/13/2013 11:47:15 AM EDT
[#1]
Interesting. But what we're looking for is how a treadmill works.
7/13/2013 11:49:43 AM EDT
[#2]
I once made a napkin drawing for an old girlfriend when I almost fried her circuits trying to explain it without pictures

I'm an engineer, she's a microbiologist....
7/13/2013 11:54:26 AM EDT
[#3]
7/13/2013 11:55:12 AM EDT
[#4]
You all mat laugh but that actually taught me something
7/13/2013 11:57:22 AM EDT
[#5]
How about this one. How a manual transmission works.



http://blog.hemmings.com/index.php/2013/02/01/tech-101-how-gears-work/




7/13/2013 12:05:13 PM EDT
[#6]
And this is what happens when they don't work.

7/13/2013 12:16:09 PM EDT
[#7]
I had never really thought about it. Pretty cool.
7/13/2013 12:33:29 PM EDT
[#8]




100% bone stock s10 crew cab. GM placed the vent tube in the same spot as the extended cabs because the crew is on a extended cab frame. The bad part is the vent on the crew sits sideways between the cab and the bed allowing rain water to roll into the diff.
And here is the shit that came out of the rear diff.

 
 
7/13/2013 12:35:48 PM EDT
[#9]
physics bro


howstuffworks has a good tutorial I believe. Angular velocity ftw
7/13/2013 12:39:40 PM EDT
[#10]
GM spider gears like to launch themselves through the diff cover. Ask me how I know.
7/13/2013 12:42:59 PM EDT
[#11]
So is this a shitty GM differential thread now ?





weeee



DOH!







 
7/13/2013 12:43:36 PM EDT
[#12]
And with an open differential, all the power goes to the free moving wheel, therefore if you're stuck with one wheel spinning, you won't get out as that free wheel has no traction.

Enter locking differentials or limited-slip in those situations.
7/13/2013 12:44:56 PM EDT
[#13]
Diffs work until one day the goodies come out , then you buy a 9 inch
7/13/2013 12:47:08 PM EDT
[#14]
Quoted:
You all may laugh but that actually taught me something

I'm an ME, and while I knew that material, it was better explained in that video than in most other instructional sources I've seen and used.  

7/13/2013 12:51:30 PM EDT
[#15]
Cool, thanks.
7/13/2013 12:55:13 PM EDT
[#16]



Quoted:


And with an open differential, all the power goes to the free moving wheel, therefore if you're stuck with one wheel spinning, you won't get out as that free wheel has no traction.



Enter locking differentials or limited-slip in those situations.


Vinny Gambini: And why not? What is positraction?



Mona Lisa Vito:
It's a limited slip differential which distributes power equally to both
the right and left tires. The '64 Skylark had a regular differential,
which, anyone who's been stuck in the mud in Alabama knows, you step on
the gas, one tire spins, the other tire does nothing.



[the jury members nod, with murmurs of "yes," "that's right," etc]



 
7/13/2013 1:00:23 PM EDT
[#17]
Good find.  I love these old auto shop film strips.
7/13/2013 1:05:24 PM EDT
[#18]
Quoted:
Diffs work until one day the goodies come out , then you buy a 9 inch




yep

7/13/2013 1:07:42 PM EDT
[#19]
Quoted:
Quoted:
You all may laugh but that actually taught me something

I'm an ME, and while I knew that material, it was better explained in that video than in most other instructional sources I've seen and used.  


 
ME here as well and I completely agree.  Simplicity is beauty and that is routinely forgotten in today's world.
7/13/2013 1:09:20 PM EDT
[#20]
Quoted:
Quoted:
Quoted:
You all may laugh but that actually taught me something

I'm an ME, and while I knew that material, it was better explained in that video than in most other instructional sources I've seen and used.  


 
ME here as well and I completely agree.  Simplicity is beauty and that is routinely forgotten in today's world.


Some people barely understand carriers and spider gears, their heads would explode if they saw a Torsen or Quaife

I've rebuilt all kinds, and some are more...involved than others...
7/13/2013 1:14:26 PM EDT
[#21]
It's been well over a half century, but I think I saw that in High School. We had an Industrial Arts teacher that brought in all kinds of neat films like that. Then there were the ones the Phys Ed teacher had us watch.
7/13/2013 1:18:20 PM EDT
[#22]
The sad part, the last factory in the US that made Hyperboloid gears (input shaft and main drive ring) closed 3 years ago.  Now, all the new gears come from China/Japan/elsewhere.

Sure, CNC can make gears, but at a higher cost than a dedicated gear cutting setup.
7/13/2013 1:23:20 PM EDT
[#23]
Quoted:
The sad part, the last factory in the US that made Hyperboloid gears (input shaft and main drive ring) closed 3 years ago.  Now, all the new gears come from China/Japan/elsewhere.

Sure, CNC can make gears, but at a higher cost than a dedicated gear cutting setup.


I drive by Richmond Gear every day, pretty sure they're still open and cranking out ring and pinion gears...

http://www.richmondgear.com/
7/13/2013 1:26:48 PM EDT
[#24]
The earlier part of the video proved to me that ARFCOM Leo's have to much time on their hands and need to spend more time on the target range.
7/13/2013 1:30:42 PM EDT
[#25]
Neat
7/13/2013 1:32:29 PM EDT
[#26]
Quoted:
The sad part, the last factory in the US that made Hyperboloid Hypoid gears (input shaft and main drive ring) closed 3 years ago.  Now, all the new gears come from China/Japan/elsewhere.

Sure, CNC can make gears, but at a higher cost than a dedicated gear cutting setup.


7/13/2013 1:33:03 PM EDT
[#27]
Quoted:
Quoted:
The sad part, the last factory in the US that made Hyperboloid Hypoid gears (input shaft and main drive ring) closed 3 years ago.  Now, all the new gears come from China/Japan/elsewhere.

Sure, CNC can make gears, but at a higher cost than a dedicated gear cutting setup.




I was going to let him slide on that one.
7/13/2013 1:38:47 PM EDT
[#28]
Very cool
7/13/2013 1:43:24 PM EDT
[#29]
I like how they talk about not having the hump in the floor for the driveshaft.  We are so used to seeing it now, front wheel drive cars still have them.  
7/13/2013 1:48:34 PM EDT
[#30]
Quoted:
I like how they talk about not having the hump in the floor for the driveshaft.  We are so used to seeing it now, front wheel drive cars still have them.  


Exhaust still has to go somewhere, and with the low floorpans, it can't fit under your feet...
7/13/2013 1:54:52 PM EDT
[#31]



Quoted:


Diffs work until one day the goodies come out , then you buy a 9 inch


Is the "9 inch" referring to the diameter of the ring gear or is it something else?

 
7/13/2013 1:56:35 PM EDT
[#32]
Quoted:
Diffs work until one day the goodies come out , then you buy a 9 inch


Hahaha. This.
7/13/2013 2:02:00 PM EDT
[#33]
Quoted:
Quoted:
The sad part, the last factory in the US that made Hyperboloid Hypoid gears (input shaft and main drive ring) closed 3 years ago.  Now, all the new gears come from China/Japan/elsewhere.

Sure, CNC can make gears, but at a higher cost than a dedicated gear cutting setup.




Spell check, I forgot how I mistyped it.
7/13/2013 2:15:17 PM EDT
[#34]
Somebody needs to post the "I welded my spider gears, and now my diff doesnt work" pic...
7/13/2013 2:18:03 PM EDT
[#35]



Quoted:



Quoted:

I like how they talk about not having the hump in the floor for the driveshaft.  We are so used to seeing it now, front wheel drive cars still have them.  




Exhaust still has to go somewhere, and with the low floorpans, it can't fit under your feet...


where's it go on RWD sports cars?



 
7/13/2013 2:19:06 PM EDT
[#36]



Quoted:


Somebody needs to post the "I welded my spider gears, and now my diff doesnt work" pic...










 
7/13/2013 2:20:36 PM EDT
[#37]
Quoted:
Quoted:
Diffs work until one day the goodies come out , then you buy a 9 inch




yep



Lol, No you buy a toploader from strange
7/13/2013 2:22:46 PM EDT
[#38]
Quoted:

Quoted:
Somebody needs to post the "I welded my spider gears, and now my diff doesnt work" pic...

http://cache.gawkerassets.com/assets/images/12/2009/02/340x_Welded-Differential.jpg


 


Nice welding project there. lol
7/13/2013 2:33:36 PM EDT
[#39]
Quoted:

Quoted:
Quoted:
I like how they talk about not having the hump in the floor for the driveshaft.  We are so used to seeing it now, front wheel drive cars still have them.  


Exhaust still has to go somewhere, and with the low floorpans, it can't fit under your feet...

where's it go on RWD sports cars?
 


Well on every RWD car I've ever had, it went down the same tunnel as the driveshaft, underneath it on the last two, actually, since they were IRS.
7/13/2013 2:53:06 PM EDT
[#40]
I had a general understanding already, but I really liked the step by step building of it with the spokes and bars.
7/13/2013 2:53:30 PM EDT
[#41]
Nice video.
7/13/2013 3:04:39 PM EDT
[#42]
Quoted:

Quoted:
And with an open differential, all the power goes to the free moving wheel, therefore if you're stuck with one wheel spinning, you won't get out as that free wheel has no traction.

Enter locking differentials or limited-slip in those situations.

Vinny Gambini: And why not? What is positraction?

Mona Lisa Vito: It's a limited slip differential which distributes power equally to both the right and left tires. The '64 Skylark had a regular differential, which, anyone who's been stuck in the mud in Alabama knows, you step on the gas, one tire spins, the other tire does nothing.

[the jury members nod, with murmurs of "yes," "that's right," etc]
 

Excellent reference. I may just watch my cousin in action.
7/13/2013 3:08:52 PM EDT
[#43]
Quoted:
Quoted:
Diffs work until one day the goodies come out , then you buy a 9 inch


Hahaha. This.


No doubt Ford 9" is a nice setup in general, but it still uses the same principles explained in the OP's film strip.  It's just a stout version.

Of course, if you're really serious then you might look at something more, like, say, an AAM 11.5...  

7/13/2013 4:00:06 PM EDT
[#44]
Quoted:
Diffs work until one day the goodies come out , then you buy a 9 inch


umm ...........


if you are refering the ford 9" it is bragged up for its removable 3rd member, not some magic

7/13/2013 4:39:39 PM EDT
[#45]
Quoted:
Diffs work until one day the goodies come out , then you buy a 9 inch


Pretty sure that's a 9 inch in the exploding differential video above.
7/13/2013 4:44:11 PM EDT
[#46]



Quoted:





Quoted:

Somebody needs to post the "I welded my spider gears, and now my diff doesnt work" pic...


http://cache.gawkerassets.com/assets/images/12/2009/02/340x_Welded-Differential.jpg





 


What is the story on this great idea?



 
7/13/2013 4:51:37 PM EDT
[#47]
Quoted:

Quoted:

Quoted:
Somebody needs to post the "I welded my spider gears, and now my diff doesnt work" pic...

http://cache.gawkerassets.com/assets/images/12/2009/02/340x_Welded-Differential.jpg


 

What is the story on this great idea?
 


The one in the pic is either a club or a boat anchor.
7/13/2013 4:53:44 PM EDT
[#48]
Quoted:
This is explained so well even an idiot like me understands it.  

Skip to 1:50 to begin the explanation.

Video Link


That's magnificent! Great find.
7/13/2013 4:54:33 PM EDT
[#49]



Quoted:





Quoted:




Quoted:

Somebody needs to post the "I welded my spider gears, and now my diff doesnt work" pic...


http://cache.gawkerassets.com/assets/images/12/2009/02/340x_Welded-Differential.jpg





 


What is the story on this great idea?

 


Yeah, what in the ever living fuck is that all about?



 
7/13/2013 5:00:01 PM EDT
[#50]
Welding the spider gears basically creates a poor man's locker (solid) differential.



Didn't realize there were so many cheap hacks with welders until I did an image search. Holy crap!
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