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Saw the thread under this but mine's just the opposite.
Was at the ranch driving around hunting hogs tonight in 4LO, and when I got back on the improved road I tried to switch out of it to 2Hi. No noises, no "service 4wd message". The lights on the selector module flashed a bit on the button I was trying to switch to but that was it.
any suggestions?
get it rolling.... just barely, then shift your transmission to neutral, still rolling maybe 2-3 mph... then try it. Mine does the same thing to me. if that doesnt work try doing it with the engine off in neutral, see if you hear it cycling trying to shift. If you dont here it trying to shift... might be the actuator or a fuse. good luck
If you happen to need one. I have 4wd switch, front diff, awd transfer case. I swapped to awd so have these parts sitting around. Chances are its an electrical issue. My truck never got stuck in 4lo. I forgot to switch back to 2wd once and pulled a trailer onto the hwy and couldn't figure out why it felt funny for about 3 seconds.
Yes, rolling very slowly in neutral. You should only have to shut the engine off to get it into or out of transfer case neutral.Quote:
Originally Posted by TurboMic
I have to do that in my jeep, only in reverse.
First off thanks a lot for taking time out of your weekend to help me!
Here's an update.
I went out this morning to look at the system some more and amazingly it shifted into 2wd and all the ranges just fine. Now for the confusing part. After driving around doing errands I tried to shift into 4wd and it went, but when I tried to go back it would only let me go into the Auto4wd mode. and vise versa. Again I parked it for an hour or so and tried to select 2wd. Went it just fine. But needed to get home so i didn't mess around any more with it.
The lights blink like it's trying to shift when the problems start. Could it be that the motor that switches modes is just flat worn out and heat is making it too hot to work? Or can someone please tell me that the dash switch is worn out so I can spend only a few bucks:beerchug:
Depending on what is wrong I just may take you up on that sir!Quote:
Originally Posted by zeake
What AWD components did you swap over? What vehicle did they come from?
In a no-slip condition there is no functional difference between 2HI and AUTO on this system. I'm guessing you have DTC C0327 and the encoder sensor is intermittent.Quote:
Originally Posted by TexasChevy
I had a problem with the encoder a few years ago, but that time I was getting a "service 4wd" warning. This time I'm not. The symptoms are almost the same as before though. If i scan it will i be able to pull it up?Quote:
Originally Posted by GasGuzzler
Was the encoder replaced when you were had those issues? I had an issue like that with mine when I first got it, the lights would flash and it would never switch. It ended up being the ground on the driver side frame rail, cleaned up the ground, reattatched, and it worked like a champ.
Yeah, the C0327 should cause a message.Quote:
Originally Posted by TexasChevy
Quote:
Originally Posted by 2001si3rr@
Very good info Steve as the encoder sensor repalcement bulletin for C0327 does in fact instruct to check this ground. This ground can also cause intermittent ABS light.
Can you tell me where on the driver side frame rail?
I took the actuator out of the front housing and pushed the button to see if it moved. Nothing happened. Also put a test light and checked for power which I got. After hooking up the light to the positive battery post I didn't get any light on when checking for ground.
Leaning towards the actuator because of lack if movement, but it still might be a simple ground. Hopefully someone can help me put the pieces together
The front axle actuator is not directly related to transfer case range. The encoder motor in on the side of the transfer case.
The ground should be easy to find on the frame brace that holds the cab mount near where the driver's fender meets the driver's door.
HTH
Is it two small bolts facing left to right? Versus on the side of the rail?
Actually typing this on iPhone and looking under my truck
Cleaned em off real good and still having problems
The front actuator will make the transfer case not shift. I know cause I unplugged the actuator in my truck and tried to get the transfer case to shift into 4 hi to see how the front diff would be on dry pavement. I bet its somewhere in the actuator. I would try unplugging it and seeing if it does the same thing. When I did this I got no codes at all.
I checked the signal voltage on each range of the dash switch and got awd: 4.85v, 2hi 2v, 4hi 3v. I didn't try 4lo because I needed to be able to drive my truck in case it got stuck in range.
Pretty much come to the conclusion that the actuator is out, unless the dash switch should have all the same voltage
got an actuator on my transfer case i took out. NP246
http://www.ls1truck.com/upload/files/198/246to241.JPG
off a 99
auto 4wd
Thanks for the offer bud but it's the actuator on the front axle.
That has nothing to do with being stuck in 4LO. 4WD maybe, low....no.
If you unplug the actuator in the front diff the transfer case will not change into anything other than what it is in.Quote:
Originally Posted by GasGuzzler
Depends on which range you start in.
I did not try it in 4 lo. Just 4hi and auto4wd.Quote:
Originally Posted by GasGuzzler
Well if the actuator isn't letting it go from 4wd to 2wd the I guess the same would happen from 4lo to 2hi since it still needs to disengage the front axle?
Replaced the actuator a little bit ago, and still not working. So far I'm down $93 with nothing to show for it.
So that leaves the encoder or dash switch. I get some various signal voltages from each range, but don't even know what they should be.
You need a scan to pull codes for the transfer case module and to check data. This would cost less than $93 even at a dealer. If you were closer I'd help.
Scanned it and got a C0379 front axle circuit malfunction code. So I guess it's not the encoder?Quote:
Originally Posted by GasGuzzler
Encoder v: 3.43
Not a common code which to me leads to wiring damage in most cases.
I got .50 cents on GG being right.Quote:
Originally Posted by GasGuzzler
Where did you get half a penny Jake? Dang ole moonshiners....:)Quote:
Originally Posted by zeake
is it the top half or the bottom half?:naughty:Quote:
Originally Posted by GasGuzzler
Looked it up on mitchells and said either actuator or faulty connections in dash switch. Instructions said to unplug actuator connector, jump it and then watch for it to unlock on a scan tool. If not then it's switch. Seem about right?
Yeah....there's more to it than that but yes. Also there is a bulletin regarding water intrusion into the module from windshield leaks. Check for that too. The module is in a different place and Jake's. Yours is under the LH of the dash above and in front of the ALDL. The older ones are behind the headlight switch.
It was the encoder gear. Went to see a friend of a friend at a Pontiac dealer, and he told me it sounded like an encoder. He just so happened to have one off of an old job. He gave it to me for free, I slapped it on and bingo everything works! Coulda bought a lot of ammo for the amount I spent on the actuator...
Yep. Weird.