Why did I not have front wheels spinning?

[Hummie2]

Sounds like a serious T-case problem. Could be a broken lockup shiftfork not letting the T-case go into lock mode. The shift motor turns the shifter cam and the encoder shows that it shifted, but nothing happen inside the T-case to shift the gears. Was the front driveshaft turning when you noticed the front wheels weren't spinning?

[tomp]

Not a wireloom problem

Hummie2, I need to check the front shaft next time I am out. More than likely it was not spinning, but still good idea

[Dug]

Since your 110% positive its in low lock (as in you could feel it was in low gear when driving ahead. ) It sounds like there could be a transfer case problem. Do you know if you have four wheel drive in Hi range?

[tomp]

I will try and take some time this week to raise all four off the ground and go through each mode to determine if I get wheel spin.

[timgco]

Originally Posted by tomp

I will try and take some time this week to raise all four off the ground and go through each mode to determine if I get wheel spin.

Are you still uner warranty? How close is the dealer? You may want them to look at it. THey can hook their techh II up to check for issues.

Also, if you have a Hypertech Programmer, plug it in and see if you get any codes.

[Dug]

Originally Posted by tomp

I will try and take some time this week to raise all four off the ground and go through each mode to determine if I get wheel spin.

tomp - a quicker way than jacking all fours up in the air to find out if your 4wd is working. Is to go out in some dirt , put it in reverse and floor it. You will now if the four wheel drive is working.

[tomp]

Wanted to clarify to everyone, that I did have the rear e-locker enabled during that time. Not sure if this makes any difference to what I was experiencing or not, but did want to bring it up just in case.

[Hummie2]

Tom, here is what you do:

1)If you have a floor jack (trolley jack) go out in the driveway and raise both rear wheel off the ground slightly. (about an inch or two)

2) get in and start the truck, shift to 4lowlock, apply the brakes lightly (just enough to illuminate the brakelights. This will disable Trac Control)

3) shift the transmission into gear and see if you can move the truck slowly with the rear wheels off the ground.

Does the truck move? If yes it went in lock ok. If no, does the front driveshaft spin? If the front driveshaft doesn't turn then the T-case isn't locked (all power going to rear axle only). If the driveshaft does turn and the halfshafts & wheels don't, then the problem lies in the frontend. (broken axleshaft, spidergear,etc.)

Being able to lock the rear E-Locker shows that the T-case motor encoder signaled T-case shift module that the shift to 4lowlock was completed, but did gears actually move to 4lowlock inside the T-case? (broken shiftfork)