Hutch i was wondering if you or anyone else has had expierence with a th400 behind a mild cummins 6bt i plan on swapping into my dually. What to do about shift modulater, governer, etc. I did see that tci makes a convertor just for this combo as well as a low gear engine brake valve body. I am also aware of transmission connections makes a bellhousing adapter and flex plate combo for this. Thanks for any info. Chime in.