Just got a 94 Blazer and the 4WD will not disengage. While troubleshooting can I just take the front driveshaft out. I am a Ford person and don't know a lot about the chevy system.

Tks in advance

 

When you say disengage, do you mean the transfer case isnt switching back to 2HI or that the front axle still turns the driveshaft while driving?

 

Don't know about the axle turning the driveshaft, the transfer case is stuck in 4WD and I need to disable so it can be driven while I search for the issues.

 

Sounds like the TCCM encoder motor is bad. I remember reading on the forum a while back that one guy just took his off and changed the transfer case into and out of 4wd manually from under the vehicle. I'll try to find it.

Heres another thread on the same topic: https://blazerforum.com/forum/showth...+transfer+case

 

Thanks I will try that, maybe add a cable control to the tcase.

 

I had the same problem. What I did was take off the connection to the encoder motor, cleaned it out with electric contact cleaner. Pulled the fuse for 10 minutes, connected it all back up and haven't had a problem since

 

thanks for the help I will check the encoder motor next, I did disconnect the vacuum line to the front axle and this made the vehicle drivable.