Quote Originally Posted by Triathlete View Post
After thinking a bit I have come to the conclusion that your front drive only experiment means moot. And here is why...
When in 4hi the front end was getting 20% power...obvouosly not enough to pull the VX. All wheels would have been turning equally at the same rate.
In 4lo there should not be any jerking since in 4lo the transfer case is mechanically split 50/50 and takes TOD out of the equation.
I agree, except that its not moot. TOD should sense the rear wheels slipping (no drive shaft, the puter thinks it is, so it senses slipping, no different than it would be on snow) and subsequently sends power to the front. That was the problem, it doesn't take the slipping input and then transfer power at a rate fast enough to make it doable,hence the jerky responses, then it seemed to reset and start the process over, giving it that bouncy jerky effect. Having said that, imagine the effects of the delay on snow or ice.

If I had to drive this way, it would be in 4low only, to remove TOD from the picture and have the straight mechanical drive engaged.