[lowest bidder]

1- I'm not trolling.
2- I'm not saying it will not cause it to fail.

I'm just trying to educate myself and understand why "driveline bind" or "transfer case wind up" could damage the transmission in anyway, since the bind goes through one front wheel to one opposite rear wheel via the front differential, front driveshaft, transfer case, rear driveshaft, and rear differential.

In my way of thinking, and I may be wrong which is why I am asking here, there is no stress transferred to the transmission in this scenario. Again, I'm not saying the transfer case will not break, I know it will. My beef is with the tranny breaking. Especially a slush box.

Can anybody set me straight please?

George

 

[gurunutkins]

I too am not sure if this TC binding is a myth or not. according to the LT230 manual the transferbox has an unlocked differential unless dif loc is selected. In that case Its not possible to bind the box up as the dif will just slip.
If the dif is locked then its another matter as the power is then split 50/50 front to back and there may well not be enough slippage between the axles to release pressure in the transfer box differential so the TB could bind up but with the dif lock not locked on then there should be enough slip in the TB so that it cannot bind and break.
I'm now going to hide in the basement in an asbestos suit.

 

[antichrist]

True. manufacturers were aware of bind up when using 4WD on tarmac. That's why they developed transfer cases that didn't great bind when running in 4WD on tarmac. One of Land Rover's solutions was the LT230 with an open diff in it. When unlocked it functions just like an axle diff does for an axle.

 

[jhmover]

If you have a 2003 there should be no way to lock the differential (unless it's been replaced or modified). They removed that option on late 2001's and then put it back on the 2004 Discos.

 

[lowest bidder]

If you have a 2003 there should be no way to lock the differential (unless it's been replaced or modified). They removed that option on late 2001's and then put it back on the 2004 Discos.

I know, I retrofitted the front output housing from a 2000 on my 2003.

Still, my question is purely a theoretical one : I'm saying I know the transfer case can be damaged by the driveline bind, but I can't see how the tranny could be damaged by it because the bind does not go through it.

I see people saying on the forums that it can happen, and I'd like to find someone who can explain to me why the transmission could be damaged by it.

Thanks all for the answers.

 

[disco biscuit]

I don't think I've ever seen anyone but you say the tranny would be damaged. All I ever heard was the transfer case. Maybe it was a mistype if you're purely hung up on what someone said in a forum...who is this person? Did you ask them?

Not trying to be difficult just objective.

 

[lowest bidder]

You're right, I'm probably hung up on this. It happens to me more and more as I get older, I think!

I like to understand things and that claim that I have read on many serious sites and forums still doesn't make sense to me.

Thank you for all the replies,
George

 

[disco biscuit]

Right on. I do the same thing. I still get caught up reading forums and instantly turn paranoid and rip everything on my truck apart...or don't drive it for fear of it all detonating in a million pieces on the road somewhere.

 

[antichrist]

The only way the transmission could be damaged is if the transfer case completely self-destructs and also takes out the transmission output shaft. Pretty unlikely.

Conversely, driving too much with the CDL unlocked in loose traction surfaces can cause the center diff to fail as the centrifugal force throws the oil out of the bearings/gears.

 

[Optimusduff]

I've been thinking about this and this is the best I can come up with........

I lifted this first blurb from the following site:

http://www.4x4abc.com/4WD101/def_turnpart.html

"When starting from a standstill with sharply turned wheels (with center diff. locked): The need for higher rpm in the front will most likely prevent you from getting started at all. If you step on the gas really hard you might get the vehicle moving with spinning rear wheels but stress on all driveline components will be dangerously high. Chance is that you will break something."

If you had large tires and were in a tight spot with the wheels locked on solid a surface. You may have a severely binding drive line. If you gave a good shot on the throttle, the transmission, weather automatic or manual would be really stressed, because nothing is moving. That would be like driving against a brick wall. If it was going to break that would be the time. I'm thinking the torque converter would be the first thing to go.