Why did I not have front wheels spinning?

[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)

[SUT NEIL]

Originally Posted by PhilD

Don't forget to have your trolley jack wheels in line with your vehicle wheels, or you'll just pull the truck off the trolley jack.

X2! Good point!

[tomp]

H2, this was a very good suggestion and made very good sense! It sounded as the quickest thing to test it as well.

I just finished dragging the jack up and down the driveway, so it appears that's it's working as designed.

I am still not sure why the front couldn't assist in getting me over the hill. Does the TC divide up the power from front to rear?

[Hummie2]

Originally Posted by tomp

Does the TC divide up the power from front to rear?

Yes, 50-50 in 4hilock & 4lolock.

[tomp]

It was definitely in low gear and the rear axle was surely locked up.

It could have acted up that day though, as after I shifted back into regular mode - it was binding at the local gas station like it thought it was still locked.

Thanks for all the help you provide here Phil. You've definitely sold a Locker, just gotta get the wife into it. If you ever thinks its strange all these women are placing orders, don't worry - it's just our wives!