I think the Rockies are the reason for the most serious mechanical issues. I did Engineer Pass and Imogine Trail. Both were awesome, but somewhere along the way, I bottomed out the truck. My Silverado is a Z71, so he's got skid plates from the factory to protect the important bits. Well, when I bottomed out, the rear lip of skid plate that covers the transfer case got bent. This caused the edge of the steel skid plate to rub against the rear aluminum transfer case housing. By the time I got home, the skid plate had worn through the housing, and it was leaking oil. I also blew out both rear shocks.
On my way up the Dalton Highway in Alaska, I plowed through a big mud puddle that was hiding a sizeable pothole. I hit it hard enough that I bent the front left wheel and threw a belt in the tire. It also knocked my front end alignment way out. For the rest of the trip, I couldn't do more than 65mph without the front end wobbling all over the place. I know that's not the trucks fault, it's just bad luck.
As soon as I got home I went to a local shop and put him up on a lift, for a full inspection. The final butcher's bill for my Alaska trip:
- Replace rear transfer case housing
- Front end alignment
- New wheels. When I bought the truck, it had aftermarket wheels on it, which I never cared for. Bending one of them so bad it couldn't be repaired was a great excuse to get new wheels
- Two new tires. The alignment was so bad it had destroyed the front tires, which were brand new before I left.
- New shocks on the rear
The whole trip was about 10,000 miles and took five weeks. I Air BnB'd it occasionally, but for the most part, I used iOverlander to find free/cheap camping spots. Even with the money I had to spend on repairs, I don't regret the trip. It was amazing and I can't wait to do something like it again. If you're interested, I posted some pics from the trip:
New Mexico to Prudhoe Bay Alaska