Hi,
Wow, I certainly heard that. I feel it would be a good idea to remove the shift motor on the transfer case. If nothing is broken such as a u-joint, axle joint or anything external, I suspect the problem is internal. It could be the drive chain that is damaged.
First, check the fluid to see if there is anything metallic mixed with the fluid. You may want to drain it, but that is up to you.
If the fluid is clean and full, remove the shift motor for inspection. Also, if you haven't already, just make sure nothing is damaged with any of the axle joints/driveshaft. The idea of the speedometer moving indicates the transmission is working. Also, make sure to check the fluid in the front differential. Something has come apart.
Let me know.
Joe
Tuesday, October 24th, 2023 AT 8:29 PM