Differences in 4X4 and AWD drive train
#11
Originally Posted by bigredexpress99
All sounds good except I'm pretty sure its a viscous coupling in the t-case that allows for the two axes to turn @ different speeds, not a differential...I have been wrong before though
It'd be nice if someone with way more computer smarts than me could hack the code on that xfer case so when youre at the track you could back off the force motor so the rear tires could be heated without hurting it then reapply the force motor so you'd be back to AWD. Even better would be once you launched the force motor could be slowly backed down as MPH increased and the need for AWD diminished. It'd be nice but all that is WAY above my head so I'll have to wait on someone else thats smarter to figure it out and market it .
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Originally Posted by 2004Denali
Yes it uses viscous coupling
For what its worth, the Yukon Denali's and Escalades use a Borg-Warner 4481 T-Case. Which is a planetary style differential, rather than a viscous coupling which is found on the Sierra Denali and Silverado SS.
#19
i do know up until 2004 in the sierra denali's... the awd case is a nvg-149 all mechanical.." not a computer controlled, or brake assist.. transfer case".. i have been pretty impressed with it so far, i truly believe the awd system that gm had in the nvg-149 is the best i have seen... in all applications...especially in snow and sand ...except for hardcore offroading...and i have owned a few older 4x4 trucks...true lockers and the bit.....
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