Everybody please watch this.

 

Here is the video I had to watch to finally understand how the diff works.

 

Thanks guys. Perhaps those videos will bring some common sense to this thread instead of conjecture and mathematical formulas which are useless in understanding how diffs work.

 

You may want to work on reading a lil more. Cuz I did try using the breaks in the snow an it worked. That as real world as it gets for me. And I can back up my real world experience with proven physics fact. Not your nonsense talk with not proof what so ever. You didn't even give examples of real world experience of your own.

So your sayin a video is a reliable source bout an article isn't. That's intelligent thinking.

 

I'm saying understanding differentials is essential here. And, you guys need to learn the difference between brake and break.

FWIW, I worked for Gleason Torsen corporation and have a very good understanding how diffs work.

 

somewhere, a large hammer drops.

this is a hilarious thread because currently i'm going through transmission of power and force theory in school. i'll just say this, there are a lot of dumb *******s in this thread who really have no idea what torque is, and its only a Google search away!

 

Double post

 

First off what we are discussing in the operation of an engine as its torque put. You may want to rethink your "understanding" of differential operation and ow torque is applied through it. If you think about the fact their are 3 types of diffs, open LSD and locked. It supports the theory on no tractions means no torque.

What did you do at Gleason if you don't mind me askin? And I'm on my fone autocorrect it a PITA.

It looks like Gleason is worth a lot. This is from the website. The say when the wheel is in the air with no traction there is NO TORQUE. Ie the engine is producing no torque to multiple.


What happens when I have a wheel in the air?
As mentioned above, the Torsen differential is a torque multiplier. The Torsen requires some type of resistance or friction in the system to function properly. A wheel in the air provides zero torque or friction on the system and as the Torsen multiplies the available torque, zero, by its TBR, the end result is still zero. In response to this, we developed the Torsen T-2R with pre-load to combat those wheel in the air situations.

 

you need torque to rotate a wheel that doesn't want to move, whether its the friction of the tire being on the ground loaded, or in the air with an applied brake. i think the limiting factor is how loaded one of your tires is. if its got more than the usual amount of weight on it you would need a lot of lb/ft to rotate that tire to begin with...then you hit the brakes and you add more resistance to rotation requiring even MORE lb/ft to move. this is why its hard on your junk. not only are you increasing the load simply because you have more weight on one tire than two, you are asking the engine to produce a lot more torque to also overcome the brakes as well. spiders don't like that.

 

Hank your right and I wouldn't use this method rock crawling but if you got stuck in some snow or mud where the wheel with traction isn't bound up, the slipping wheel is just limiting torque then it would be useful.

 

i agree with you. if you are in some deep snow, do it! theres going to be some slippage between the tires and the snow anyways. rocks? maybe no lol.

 

I don't think that anyone with an understanding of the differential has argued with you on this point. Of course, just to clarify, it is not a "no-torque" situation, there will be torque required, but only to move the wheel/tire in the air rotationally. Also, there is still 50% of this torque the engine is producing is acting on the wheel tire which is not moving (Using the 50/50 open differential idea). In a real-world situation, however, this amount of torque will be so minimal it will not come close to turning the fixed wheel.

 

this thread is dumb.

just go out and wheel your crap.

just wait and no4x4yet will break his spiders just like holycaveman did. then he will buy a lunchbox locker and this thread will be a thing of the past

 

I've got an idea; jack a rear tire off the ground in 2hi (open diff). Rev engine, observe no movement. Have friend rev engine while you grab spinning tire. Observe torque. Just because you can't see it, doesn't mean its not there. The fact that the tire is spinning is evidence to the fact that there is torque, because what is torque? Rotational force!

Regardless of who is correct in this situation, the method you are choosing to use will cause damage to your vehicle. It may get you unstuck, it may not.

I was never very good at math anyways, I just know its better to have 2 wheels on the ground instead of one.
Cheers

 

I worked for them when they had the cross-axis diff, not the piece of crap parrallel axis they ended up adopting through one of their sales to other companies. The original had a 9 to 1 TBR. It was reduced down to about 5 to 1 in the Humvee application.

As for diffs, wasn't this thread started by a guy asking about applying the BRAKES to add traction? That's differential action to me.