I have heard from multiple toyota truck that are older that its a bit tricky and takes some advice to switch it back from 4 wheel drive (eith h4 or l4) into 2 wheel drive. I have a 1991 4-cyl model short bed manual transmission. Any advice or tricks or suggestions? We have trouble every time. The diagram on the stick shifter for the 4x4 isn't entirely accurate. Help from someone who's been there? Thanks!