NEED HELP Stuck in 4hi, but not

eightshot627

Well-Known Member
#1
I'm over at the in-laws and noticed the selector switch was reading 4hi. The switch is in 2hi. It doesn't feel like it is in 4wd. The switch blinks 2hi when I put the switch to 4hi then back to 2hi. I don't hear whirling sounds either front or middle. I have already replaced the tcm with a 2003. I also tried pulling both fuses and swapping them with spares. When selected it will go to auto but when try to put it in 4lo or 2 hi it flashes there and then quits and stays in 4hi. No service 4 wheel drive light. I have been using 4wd a lot the last 3 weeks without issue.

Any ideas that I can try without tools or test equipment?

Thanks,
Walt
 

MRRSM

Lifetime VIP Supporter
#2

Sir ffeJ

Well-Known Member
#3
The contacts on the switch can get dirty and give false readings. Try cleaning the contacts by rotating the switch several times (with ignition off)

Perhaps also try a restart by disconnecting the battery for 30mins. I know the fuses usually do that but I'm just thinking of anything right now.
If that's a no go, there isn't much you can do without tools right now.
 

Sir ffeJ

Well-Known Member
#5
Can you elaborate on the 2003 TCM you mentioned replacing. What was the reason for that?
Perhaps the replacement has failed?
 
OP
OP
eightshot627

eightshot627

Well-Known Member
#7
In 2015 i was troubleshooting and got the 2003 TCCM. As it turns out my TCCM had already been replaced. The fault then was the encoder motor. I think more specific the position sensor in it.

Now that I'm home the darn thing started working again this morning. At least it went to 2hi and then 4hi and back to 2hi when commanded. Worked this evening too. Not sure the front really engaged but I'll check that out.
 
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OP
eightshot627

eightshot627

Well-Known Member
#8
Ok now it will only go to 4hi or auto. No 2hi or 4lo. I heard a high pitch wine at the transfer case encoder but the front actuator was silent. I pulled it and it looked like it was pushed out. It pushes itself out when I took out the bolts. With the actuator removed and the front on jack stands it would free wheel the right and using the end of a ratchet push the fork in and turn both from the right. Releasing the fork it would unlock. Returning the actuator in place would lock up the front.

Do the front actuator fail engaged?
 

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