Yukon Denali Fail

[sumo]

Wow. I would never do that to my Denali but to each is own... Why weren't the front tires spinning? I always thought that the Denali/Escalade AWD system would spin both fronts when the rears were spinning?!?!

4wd all wheels are engaged all the time. You have to manually engage 4wd and stays engaged until deselected.
Awd is basically a assist type drive system or auto 4wd. awd designs differ from make to make, But most act primarily as a Rwd or Fwd and when it detects Slipping, It would engage the other set of wheels to Help assist with traction. Once slip is no longer detected it would return to mostly fwd or rwd setup. the front wheel wasn't spinning Probably because it was buried so deep it couldn't move, or that the Fluid in the transfer case got so hot, that it wouldn't allow the awd to engage.

---------- Post added at 08:41 AM ---------- Previous post was at 08:37 AM ----------

Some clean shots of the truck

Hot daym, With a nice looking truck like that, the only way mine would even come close to the dessert would only if i was towing some atv to do what you did.. Soooo what was the total damage cost of that little adventure mishap?

 

[gnarpow]

Whats up with that exhaust tip sticking out 12" from the bumper. Trying to burn your shins?

 

[Nickleahy23]

lol i drive my truck harder then that everyday..nothing like a littke gymkhana sesh out on the lake, whipping 4x4 360s while doin 60 in a straight line

 

[jmyler]

Boy, the grammar in this thread went down hill quickly. What happened.

 

[VisionxOrb]

4wd all wheels are engaged all the time. You have to manually engage 4wd and stays engaged until deselected.
Awd is basically a assist type drive system or auto 4wd. awd designs differ from make to make, But most act primarily as a Rwd or Fwd and when it detects Slipping, It would engage the other set of wheels to Help assist with traction. Once slip is no longer detected it would return to mostly fwd or rwd setup. the front wheel wasn't spinning Probably because it was buried so deep it couldn't move, or that the Fluid in the transfer case got so hot, that it wouldn't allow the awd to engage.

---------- Post added at 08:41 AM ---------- Previous post was at 08:37 AM ----------

Nope wrong, AWD does not act as fwd or rwd and then detect slipping and engage. they are always engaged but have some kind of mechinism to allow the front and rear to spin a different speeds so the drive line does not bind up on dry pavement. while there are different designs for sure ( open differental, viscous coupling, torsen, clutches ect. ) the current bogwerner AWD in the denalis/esky IS THE WORST OF THEM ALL aka open differental type. if the front had traction and the rear didnt, then it sent all the power to the rear and you went no where. the older denalis used the NVG 149 AWD case which used a viscous coupling so no matter what it would still send power to the front, and was a much better case ( but maybe not as smooth making a uturn on the street ). We got hosed with this case with out a center diff locking option. you could have tried to use the parking break to send power to the front which might have helped if you didnt dig your self down to the frame. but oh well.

Ive been wanting to try to see if there is a way to swap in a NVG149 inplace of ours but its the wifes car and she doesnt wanting me messing with it. im sure i could fit it in there but the question is how to connect it to the 6speed tranny.

 

[AmazinglySmooth]

Nope wrong, AWD does not act as fwd or rwd and then detect slipping and engage. they are always engaged but have some kind of mechinism to allow the front and rear to spin a different speeds so the drive line does not bind up on dry pavement. while there are different designs for sure ( open differental, viscous coupling, torsen, clutches ect. ) the current bogwerner AWD in the denalis/esky IS THE WORST OF THEM ALL aka open differental type. if the front had traction and the rear didnt, then it sent all the power to the rear and you went no where. the older denalis used the NVG 149 AWD case which used a viscous coupling so no matter what it would still send power to the front, and was a much better case ( but maybe not as smooth making a uturn on the street ). We got hosed with this case with out a center diff locking option. you could have tried to use the parking break to send power to the front which might have helped if you didnt dig your self down to the frame. but oh well.

Ive been wanting to try to see if there is a way to swap in a NVG149 inplace of ours but its the wifes car and she doesnt wanting me messing with it. im sure i could fit it in there but the question is how to connect it to the 6speed tranny.

I thought they have auto-locking differentials. Did I misunderstand the dealer?

 

[VisionxOrb]

I thought they have auto-locking differentials. Did I misunderstand the dealer?

The auto locking diff they are referring to is the eaton G80 which goes in the rear axle differental and locks when there is a large enough rpm differance between driver and passanger side tires ( which is why it has a high failure rate. locking when there is a big speed differance is a bad idea its like neutral slaming an automatic tranny ). has nothing to do with the transfercase ( center diff as in between front and rear axles )

 

[phileaglesfan]

6000 lb vehicles are usually not that good in deep sand.

 

[sumo]

Nope wrong, AWD does not act as fwd or rwd and then detect slipping and engage. they are always engaged but have some kind of mechinism to allow the front and rear to spin a different speeds so the drive line does not bind up on dry pavement. while there are different designs for sure ( open differental, viscous coupling, torsen, clutches ect. ) the current bogwerner AWD in the denalis/esky IS THE WORST OF THEM ALL aka open differental type. if the front had traction and the rear didnt, then it sent all the power to the rear and you went no where. the older denalis used the NVG 149 AWD case which used a viscous coupling so no matter what it would still send power to the front, and was a much better case ( but maybe not as smooth making a uturn on the street ). We got hosed with this case with out a center diff locking option. you could have tried to use the parking break to send power to the front which might have helped if you didnt dig your self down to the frame. but oh well.

Ive been wanting to try to see if there is a way to swap in a NVG149 inplace of ours but its the wifes car and she doesnt wanting me messing with it. im sure i could fit it in there but the question is how to connect it to the 6speed tranny.

like i said awd differ depending on the make. There are various types of awd out there