for long rides on the highway I would like to install a converter lock up on my 5R110W. When I release the accelerator pedal only slightly on my 2006 F350 6.0, it immediately shifts from OD to 5th gear. Then it increases the engine speed and shifts back to OD. This is very annoying. Is there a solution that only works from 3rd gear up? How did you implement a converter lock up?