I just bought this '92 Explorer which i automatically named "Dora", on the same day me & my sister went for a drive, we wanted to see if the 4 wheel drive worked, we found a muddy spot on a back road after a storm from the night before, I put it in 4 wheel drive & the front left 4 wheel drive hub didn't lock, & the wheel didn't do anything. with the Transmission replacement, i plan to fix that hub.