wont stay in 4wd
 

Ok, finally got my truck to kick out of 4w high lock, by backing up and turning the wheel in neutral, but now it will not stay in 4wd, after hitting a small bump in the road, it kicks back into 4 wheel high lock. So is it an electrical problem, wiring, or?

Sounds like either the wires going to the transfer case actuator are loose or its the t case actuator itself? Crawl under and check to see if the connector looks tight. Jiggle the wires and see if that changes the t case mode. Also look for frayed wires, worn insulation, etc. If it's the t case actuator its an easy R&R.

where exactly am I looking? I am real familiar with this system yet...is it on passenger side or driver side, and what exactly am I looking for? sorry, bit of a noob

This is a great photo of what you are loooking for

Hummer H3 Borg Warner Transfercase Photo 3

If it were a wire or voltage problem it seems like the lights would come on.
If it does it by itself it sounds like a break inside,the locking mechanism.
The lock sleeve must move,by itself? No fork,broken fork.
Bad wires could not activate the motor unless told to by the control
computer. The motor is turned off after moving to its proper position.

Mine was doing basically the same thing. It ended up being the fork in the transfer case. What year is yours?

When asking these questions, YEAR and MODEL are important.

I think the only difference is the low range gear ratio and the ones with the plastic fork. The gear ratio should not matter.
It could be a metal fork broken.

It's a 2006, wouldnt the fork throw a code or no? Took it to shop, they think it's the switch inside?

Not sure what you were getting at?????

Years and models always matter. If somebody is gonna ask for help with a problem and expect an answer beyond a wild guess, then they should add the extra keystrokes to include year and model.

Year 06 and early 07s came with the plastic T Case fork.

Year and model matter as to which T Case actuator was used, and which TCCM was used, both of which can lead to the OP's problem, some of which were more problematic than others. Since the OP still hasn't supplied model, I'm not gonna bother........ let him figure it out.

I saw this post and immediately knew it's an 06.
Your plastic shift fork is broken.
The code it throw's is:
"Ok, finally got my truck to kick out of 4w high lock, by backing up and turning the wheel in neutral, but now it will not stay in 4wd, after hitting a small bump in the road, it kicks back into 4 wheel high lock"

I'm in the h3 thread, correct?? It is a 2006 H3

Not the shift fork.. Mechanic just called..something to do with a hub? Anyway they are ordering new one

Hmm...I don't know about that. Good luck.

When this happens it is almost always the fork or the hub/ sleeve, could be other stuff naturally. They are all mostly the same.

"The lock sleeve must move,by itself? No fork,broken fork.
Bad wires could not activate the motor unless told to by the control"

The fork runs in a groove in the lock sleeve. If the fork is good,the sleeve must have lost part of the groove. We would love to see the bad part pictures. The sleeve locks the main shaft to the front drive chain gear. Iwould insist on a new fork.

I will def see if the mechanic will let me get pictures, I will like to see it for myself

ok, it was the lock sleeve, andd they also replaced the shift fork with a metal one, I finally get it back tomorrow!

:D...

Hi there !!! I have a similar problem ,When I turn the key to ignition on mi h2 05 don't, the lights of the 4x4 buttons don't stay on ... They turn on just for a few seconds and then turn of ... The control traction and the suspension buttons too,, they dont respond at all ... I was trying to get the reverse light In the stirrup , to turn up a reverse camera ... Was no short cuts , I did it with a led tester .. In some wires I noted , some windows roll up just with testing it ... Hope yo can help me !!!!! Please ...