First, there is no way to disengage the auto 4x4. Unless you do the BWM. 3rd Gen Xs do not have T/C.
Second, I hit the Bighorns this weekend. Finally! I was pretty stoked. We started by climbing up Red Grade Rd (8% grade for 5 mi.). Once on top, we went down to a creek bed. Nothing to technical, but I did have to get out and check my lines again. I had to stop several times to check my clearance. I have some pics of how close the rear swing arms came to dragging. We hopped on down to Sand Coulee from there. It had been a while since I had been down there. It did not seem very steep going down, but on the way up, it was much steeper than I realized. I switched 'er into 4LOW to see how it would go. No problems there. Overall, it was a good trip.
Here are some observations I made, incase you are going out in your 3rd Gen X for the first time:
1. I have done the BWM and had no problems switching back and forth between 2WD to 4WD; and between 4High and 4LOW.
2. The transmission seemed to stay in the gear that I selected. It actually performed like a manual. I started several hills with the gear selector in 2nd. After the grade increased, I thought something broke because I was losing power. I put it in first and she started climbing again. The next hill I took, I started in first and was traveling under 5mph and put it in 2nd, and it shifted to 2nd. I even noticed it starting from a dead stop in second.
3. I found myself doing the teeter-totter pretty often. AKA: My right front and left rear were on the ground, but my other two wheels were in the air or not getting enough traction. Or visa-versa. Note to self," You need those 265s"!
Other than that, smooth sailing.
I have pics if someone wants to post them or wants them mailed.
Jared G.