I am looking to improve my rig by upgrading my stock 3-speed tranny. I have looked at the 5-speed option, but it gets very expensive with all that is needed. Have read a lot that the 4-speed makes the FJ40 a nicer daily driver. Besides getting the H41 4-speed transmission and bell house, what else do I need? Can I use my current T-Case, or do I also need a new one? Just want to see what all is involved from parts and labor before I jump in. Thanks for any help advice you can offer me!