During the process of re-gearing to 3.73's (did the rear first) I decided I wanted to see how bad the whole system would sieze with different ratio's. I went to a parking lot with old crumbly asfalt and threw it in 4wd. I went from 5 to 0 like someone hit the brakes. If you have different ratio's, you'd know about it the first time you tried it in 4wd.