[hmmbagodden]

I'd try swapping the box. Perhaps someone else with 4x4 can do a quick swap to see if their box works.

 

[Yamaha244]

huh, well, if you flooded the floor, I still think your issue is that box because as well all know water and electronics don't mix well.

Then again, I've been wrong before. :shrug:

I've had a couple inches inside the cab. It looks alright. Not saying it is. But looks it. Took the box off the side of the transfer case make sure it was cleaned on the inside. There's deff a electrical problem with the 4x4. My guess would be the box on the transfer. The 4x4 lights on the dash and service 4x4 started coming up after I unplugged a cord from the box on transfer case. To me just sounds like a need to man up and sas sooner than expected.


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[mark44883]

Okay so now the 4x4 lights aren't coming in and it says service the 4x4?
When the key first turns on the lights on the dash turn on but shortly go off and a high pitched noise comes from the transfer case from about 15 seconds

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What was your fix on this problem? I’m having same problem ..4wheel drive lights on with key then go out high pitch whine for 10 seconds. Have a service four wheel drive light on dash.

 

[OldGuy]

You're dealing with multiple issues here I think. First, clean the grounding points on the inside fenders on both sides (that will probably give you your lights back). When you put in 4WD, listen for a noise from the transfer case. If you hear the transfer case engaging, then the box under the seat is working. Have someone check for voltage at the front axle actuator. If you have voltage there but the front axle doesn't engage, i'd replace the actuator. If there's no voltage there, I'd replace the "do-dad" on the side of the transfer case. Unscrew the actuator and plug in the wires to it and put it in 4WD and see if it extends like it's supposed to. If it does, but the front axle isn't engaging, you need to replace the bearings inside the driver's side tube. They get worn out and allow a lot of play and the front axle lock-up won't engage.
Please report back and let us know what you found.

 

[mark44883]

This is what I have done so far ,changed fluid in transfer case, dialed electric greased connections on four-wheel-drive actuator .I’ve taken the four-wheel-drive actuator off and it does work turns when TWO High is pushed,but not four high or low. No sounds at all. Cleaned connections on ground on both fenders. Still no lights after First few seconds of key being on.. This all came after A lose ground on battery.

 

[Chivers1]

You're dealing with multiple issues here I think. First, clean the grounding points on the inside fenders on both sides (that will probably give you your lights back). When you put in 4WD, listen for a noise from the transfer case. If you hear the transfer case engaging, then the box under the seat is working. Have someone check for voltage at the front axle actuator. If you have voltage there but the front axle doesn't engage, i'd replace the actuator. If there's no voltage there, I'd replace the "do-dad" on the side of the transfer case. Unscrew the actuator and plug in the wires to it and put it in 4WD and see if it extends like it's supposed to. If it does, but the front axle isn't engaging, you need to replace the bearings inside the driver's side tube. They get worn out and allow a lot of play and the front axle lock-up won't engage.
Please report back and let us know what you found.

How hard are the bearing in the front axle tube to replace

 

[OldGuy]

It's not too bad. All you need to mess with is the tube that goes from the differential (Pumpkin) to the driver's side of the truck. So, you tear down the front end like you would to replace the driver's side CV axle and you take that out. Then you just go a little further into it. First, you need to make sure that's your problem. Jack up the front end of your truck until both front wheels are off the ground. Crank up the truck and put it in 4x4 and turn one of the front wheels. If the front end lock-up is working, when you turn one wheel the other one will also turn. If it doesn't lock-up, remove the front axle actuator. It's the round plastic part with an electrical plug going to it. Disconnect the wires and use a large pair of channel lock pliers to screw it out. Connect the wires back to it and put the truck in 4x4. In 4x4, the plunger will extend and in 2WD, the plunger will retract. If the actuator is working and the front end is still not locking up, you have a problem with the front actuator fork that is probably caused by worn out parts in the front axle tube that goes from the differential to the driver's side of the truck. With the actuator still out, take a screwdriver and stick it in the hole where the plunger goes and press really hard on it. If you feel the screwdriver going in and the front wheels lock-up then you need to remove the axle tube and replace some parts. Let me know what you find. I should have made a "how to" on this procedure because I can't find a video that is specifically for out trucks, so I had to watch a few on Silverado's and figure it out myself.

 

[OldTime]

This problem sounds like the 2/4 switch on the transfer case is bad. My Chevy parts manager states that if the actuator is good the switch is then most likely the problem.

 

[ronnierelentless]

Halls transfer case motor is the part they are replacing

 

[ronnierelentless]

Okay so now the 4x4 lights aren't coming in and it says service the 4x4?
When the key first turns on the lights on the dash turn on but shortly go off and a high pitched noise comes from the transfer case from about 15 seconds

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Trans case motor is working intermittently

 

[ronnierelentless]

What was your fix on this problem? I’m having same problem ..4wheel drive lights on with key then go out high pitch whine for 10 seconds. Have a service four wheel drive light on dash.

Your trans case motor , not the whole transfer case

 

[ronnierelentless]

Someone gotta have a clue to what's goin on


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Trans case motor

 

[ronnierelentless]

Not the whole trans case just motor that engages it yall are hear that motor winding it’s not engaging lock gear to lock it in