4 Wheel Drive/SUVs: 2002 oldsmobile bravada transfer case knock, oldsmobile bravada, 2002 oldsmobile bravada

Question
hi i just recently bought this bravada and it seems when i fix one thing another problem comes up. im not sure if this knock is coming from the tranny or the transfer case the noise seems to be located somewhere inside where they are connected. iv checked the fluid and all the bolts every thing seems to be tight and full. the noise occurs when the car is idling in gear or not.and may occurs when im actually moving but i think the car drounds the sound out. thank you for your time. the suv is an automatic if that makes a difference

Answer
Daril,

As there should be no internal components moving in the transfer case unless the transmission is put into gear, I would suspect a front bearing in the transmission, or an engine problem.  It's also likely that you could have a broken or bad transmission or motor mount.  I would check for this first as this could cause the transmission, transfer case or any connected components such as linkage to hit the frame or body.  One way you can check this is by revving the engine and have someone watch the engine and/or the transmission to see if they are moving enough to cause any parts to hit anywhere.

I would go to an auto parts store, or a hardware store and purchase a cheap automotive stethoscope.  These are great for finding and pin pointing internal mechanical noises such as the one you are describing.

Without actually hearing this myself, it's really hard to diagnose the actual problem.

Carl