Easy one, but you gotta think

[blacksnapon]

Customer comes in exclaiming that he has a posi at front and rear. Knowing his front diff is open, you tell him "NOPE"! "Well, why does all 4 wheels spin in 4x4 when accellerating in gravel?" Explain it to him!

 

[Blue Goose]

If the traction is equal on all four corners, all four will show equal scratch...

 

[Fordzilla80]

Sir, you have two choices. Read your owner's manual and learn more about what your truck is equipped with and how to use 4x4, or get a 4x2.

 

[LEB Ben]

I'm with Brad. Torque dispersion is equal.

 

[blacksnapon]

If the traction is equal on all four corners, all four will show equal scratch...

Nah, not good enough! It'll do it on all surfaces.

 

[blacksnapon]

Sir, you have two choices. Read your owner's manual and learn more about what your truck is equipped with and how to use 4x4, or get a 4x2.

"I resent you talking to me like a child!" (I actually had a customer tell me that after the sales staff asked me to talk to the customer).

 

[Fordzilla80]

lol, It sure seems like the dimwitted are attracted to you.

 

[blacksnapon]

C'Mon, think how the differentials work..........all 3 of them!

 

[fatherdoug]

If you're locking the front and rear driveshafts together via the transfer case, is it possible to have the posi work on both axles?

Just a guess from a chemist, not a mechanic.

 

[TexasNomad]

I know jack about this subject so please school Ol' wise man of the grease..

 

[blacksnapon]

If you're locking the front and rear driveshafts together via the transfer case, is it possible to have the posi work on both axles?

Just a guess from a chemist, not a mechanic.

Very Good! If you had posi on both ends, it would take a 40 acre field to turn it around. With the transfer case, neither of the front tires will spin unless the back tires spin. So, essentially, the rear posi works on all 4.

 

[5.0Flareside]

hmm... that sorta makes sense...

 

[FordF-SuperDuty]

Very Good! If you had posi on both ends, it would take a 40 acre field to turn it around. With the transfer case, neither of the front tires will spin unless the back tires spin. So, essentially, the rear posi works on all 4.

Why did Ford offer front and rear limited slip then? So as your saying the T-Case is an open differential hooked up to two different differential if one of those differentials is some kind of locker, limited slip, etc. that won't allow spin you can't spin the other differential.

 

[blacksnapon]

Why did Ford offer front and rear limited slip then? So as your saying the T-Case is an open differential hooked up to two different differential if one of those differentials is some kind of locker, limited slip, etc. that won't allow spin you can't spin the other differential.

One end won't spin unless something on the other end spins. To my knowledge, limited slip was never offered for the front in stock configuration. When you go around corners, the outside tire has to spin faster than the inside tire, which is prevented by a "locking" style diff. This then becomes a safety issue. Manufacturers didn't want that liability.

 

[m78]

I don't see how that's possible, the front drive shaft turns the gears in the front differential the same way regardless.

 

[blacksnapon]

I don't see how that's possible, the front drive shaft turns the gears in the front differential the same way regardless.

Yes, but remember, you have spider gears and a carrier that allow differential operation (thats why you can turn one wheel in front and the other wont spin, or it goes the other direction if its engaged), The clutches in a limited slip "lock" the spider gears to the case preventing the differential action.

 

[m78]

. With the transfer case, neither of the front tires will spin unless the back tires spin. So, essentially, the rear posi works on all 4.

I can see the tire slip being equal from front to back through the transfer case, But not from left to right on the front, just because you have L/S in the rear. The front drive shaft can not tell the front differential that the rear has L/S.
So the front could actually have one tire slip more if the weight wasn't equal on both sides.

 

[countryboytn]

I can see the tire slip being equal from front to back through the transfer case, But not from left to right on the front, just because you have L/S in the rear. The front drive shaft can not tell the front differential that the rear has L/S.
So the front could actually have one tire slip more if the weight wasn't equal on both sides.

That's exactly what I was thinking, and was hoping I wouldn't have to type it all out.

 

[flareside_thunder]

I thought that Broncos had an LS front, every one I've seen has...even a few F150's have had LS fronts.

 

[countryboytn]

I thought that Broncos had an LS front, every one I've seen has...even a few F150's have had LS fronts.

Miner just has a LS rear, and it sucks. It only locks up when it wants too.