I am trying to sort out this odd problem but I cannot find anything through searching. I should mention I come from Jeeps (and their very simple transfer cases and 4x4 systems, haha!).
In my 04 envoy, when I have it in A4WD or 4Hi, I will occasionally get a slight shake coming from what I believe is the transfer case. It does NOT seem noticable while driving, only when sitting (whether in drive or park). I noticed today that in 4hi, I had a bit of a 'clunk' while driving through an intersection twice - the same one. It did not 'slip' or have wheelspin, only a clunk presented itself. I then pulled into a parking lot shortly after, and it was vibrating. I put the transfer case into 2hi, and the same clunk presented itself and the vibration stopped.
Am I wrong to assume this is a transfer case motor problem? It seems to shift okay between all four modes (2hi, 4awd, 4hi, 4lo) in that I can hear the actuator engage and I did verify that the transfer case is in each of these modes once selected (up in air on jack stands).
As a side note - I only use 4hi when the roads warrant it - for example, today the roads were covered in snow and ice.
In my 04 envoy, when I have it in A4WD or 4Hi, I will occasionally get a slight shake coming from what I believe is the transfer case. It does NOT seem noticable while driving, only when sitting (whether in drive or park). I noticed today that in 4hi, I had a bit of a 'clunk' while driving through an intersection twice - the same one. It did not 'slip' or have wheelspin, only a clunk presented itself. I then pulled into a parking lot shortly after, and it was vibrating. I put the transfer case into 2hi, and the same clunk presented itself and the vibration stopped.
Am I wrong to assume this is a transfer case motor problem? It seems to shift okay between all four modes (2hi, 4awd, 4hi, 4lo) in that I can hear the actuator engage and I did verify that the transfer case is in each of these modes once selected (up in air on jack stands).
As a side note - I only use 4hi when the roads warrant it - for example, today the roads were covered in snow and ice.