Jeeps Canada - Jeep Forums

Jeeps Canada - Jeep Forums (https://www.jeepscanada.com/)

- Jeep Mailing List (https://www.jeepscanada.com/jeep-mailing-list-32/)

- - 4wd terms (https://www.jeepscanada.com/jeep-mailing-list-32/4wd-terms-8131/)

That brake trick works excellently too!

For some reason, the rear drum brakes seem to transfer the torque easier
than the front disks, so it is easier to get both back tires spinning
than all 4 spinning though I have managed a 4 rooster tail take off a
couple times.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jerry Bransford wrote:
>
> One thing to remember about open differentials... and this is not just a
> rumor or something that I made up... no matter what is happening, whether
> either wheel has good traction, poor traction, or one wheel has good
> traction and the other has zero traction... both wheels always always always
> (!!!) receive exactly (!!!) the same power to them. The power is ALWAYS
> split 50:50 between the left and right wheel on an open axle. Ok now you're
> saying --------... but it's true, really. What happens is that when one
> wheel starts spinning and has no traction, the axle starts spinning the tire
> that has the least amount of traction which then presents the engine with
> little or no resistance to work into. With no resistance to work into, the
> amount of torque produced drops down to nearly nothing. That "nearly
> nothing" amount of torque is split 50:50 by the open axle (again, really)...
> which is enough torque to spin the tire with little or no traction available
> to it, but not enough to spin the tire that still has traction.
>
> So limited slips do not "send power" anywhere, they act by friction or by
> gearing to couple the spinning tire to the one with traction to present more
> resistance to the engine... with more resistance felt by the engine, the
> amount of torque it sends to the rear axle is increased. That additional
> torque is still split 50:50 but may now be enough to get the tire with good
> traction to begin moving the vehicle again.
>
> So it's a basic fact that both wheels are indeed (really...) getting a 50:50
> split of the power being sent to it via the driveshaft. Whether that 50:50
> split provides enough torque to the wheel with good traction decides whether
> you move or not.
>
> So all this is why the old trick invented back in Model T days of applying
> the brakes when you're stuck really does work. It causes the engine to see
> more resistance so it develops more torque when the tires can't provide
> enough resistance themselves and start spinning.
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
>
> "CRWLR" <CRWLRJEFF@YAHOO.COM> wrote in message
> news:vsg71dnimujrcf@corp.supernews.com...
> >
> > "Clem" <mygodisthereanamenotchosen@yahoo.com> wrote in message
> > news:vsfurfq4qjc847@corp.supernews.com...
> > >
> > > "Simon Juncal" <sjuncal@erols.com> wrote in message
> > > news:3FC7947B.90100@erols.com...
> > > > Jeep open difs in 4L mean one wheel gets power in the front and
> > > > one in the rear,
> > >
> > > Incorrect. If only one wheel on either axel is driving the vehicle, then
> > it
> > > would get really squirrelly while you accelerate.
> > >
> > Technically this is not true. Open differentials are in the vast majority
> of
> > cars on the road today. Limited slip is on sports type cars, and lockers
> are
> > only available on a very limited number of offroad vehicles, and some new
> > pick up trucks.
> >
> >
> >
> > > 2WD means just that... 2 wheels driving the vehicle. 4WD means that 4
> > wheels
> > > are driving the vehicle.
> > >
> > 4 wheels are driving the vehicle ONLY when 4 wheels have traction. An open
> > differential will divert all power to the tire that has LOST traction.
> This
> > can result in one tire on each axle getting power.
> >
> >
> >
> > > It's only when a wheel looses traction that it SEEMS like only one wheel
> > is
> > > driven. Not correct, though.
> > >
> > Actually, it is absolutely correct. It not only SEEMS like only one wheel
> is
> > getting power, it is fact that only one wheel is getting power when it
> loses
> > traction.
> >
> > >
> >
> >

That's when it's nice to have a good working emergency brake.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> That brake trick works excellently too!
>
> For some reason, the rear drum brakes seem to transfer the torque easier
> than the front disks, so it is easier to get both back tires spinning
> than all 4 spinning though I have managed a 4 rooster tail take off a
> couple times.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

And adjusted so that one or two clicks will get you going.

Another thing that will keep you out of trouble in the winter is a small
engine, but most of you guys aren't smart enough for that. ;o)

Earle

"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:3FC8EB79.4C3974BC@cox.net...
> That's when it's nice to have a good working emergency brake.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > That brake trick works excellently too!
> >
> > For some reason, the rear drum brakes seem to transfer the torque easier
> > than the front disks, so it is easier to get both back tires spinning
> > than all 4 spinning though I have managed a 4 rooster tail take off a
> > couple times.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's

Earl:

My 1960 VW Bug had a small, 36 hp engine, but that didn't keep me out of
trouble when I was a teenager.

:)

Tom

"Earle Horton" <enfermero_diabolico@registerednurses.com> wrote in message
news:bqbiik$20g9aq$1@ID-147790.news.uni-berlin.de...
> And adjusted so that one or two clicks will get you going.
>
> Another thing that will keep you out of trouble in the winter is a small
> engine, but most of you guys aren't smart enough for that. ;o)
>
> Earle
>
snip