4 wheel drive not working

Good morning, thanks for your help. I replaced the actuator this morning, but it still does not work. 4 wheel instrument lights go on then off and stay off. Cannot be switched. Locked in 4 wheel. Thanks

Thanks For the help I decided to change the transfer case shift motor and everything is working perfect. Thanks again

I have a 8 cylinder 7.4L suburban. A friend had vehicle in drive but not moving and engaged 4wd. What kinds of problems could result from doing this? The shop said I needed rear axle housing 3/4 ton w/9.5" ring gear, transmission, and a transfer case to be replaced with used parts. I am wondering what could have occurred by just pressing the 4wd button while the vehicle was not moving but in drive. Please let me know if this sounds right.

Is it possible to cause those types of damage just by attempting to engage 4wd while in drive at a standstill?

Would the transfer case switch being bad cause damages to the rear axle housing ring gear and transmission?

Drive Train Axles Bearings problem
1998 Chevy Suburban V8 Four Wheel Drive Automatic 200k+ miles

When put in 4wD we get a lot of clunking from the front end. Could this be the Transfer case actuator not engaging completely?

I think it is coming from the front axle, almost seem like the passenger side but hard to tell. Feels like someone is smacking the axle or hubs with a 5 lb mallet. Are the locking (automatic) hubs in this vehicle something that can be disassembled and lubed? I had an Isuzu Trooper II w/semi-auto hubs that had to be disassembled and lubed with ATF once a year or they would keep popping out and dis-engaging as you traveled down the road. I was going to price a new solenoid but I hate the shotgun approach. I had a GMC Sierra p/u that had a solenoid that mounted on the front axle assy, this one appears to be on the side of the transfer, right? My ALLDATADIY account does not show good breakdowns of the 4Wd system.

Thanks again.

Please note that this is a1999 NOT a 1998 as originally posted. My apologies.

1997 Chev suburban won't go into 4 wheel drive. I have replaced actuator and transfer case switch, but it still won't work. I do have power at both actuator and switch, and the fuse is fine. What do I try next?

Okay, will try that in the morning. What about the front axle engagement switch? Know anything about that? All three wires going into it are frayed. I took it out, and checked for power, and it does receive power when I place the 'burb into 4 wheel drive.

Seems to be a rare part, but have found a couple of places online that have it.

My 4 wheel drive on my 1997 chevy suburban will not engage the light flashes but it doesn't engage at all. What is the problem and how can I fix it myself. Thank you.