Gear Vendors for Excursion V-10 4.30 rear

Thanks - I didn't know the Allison used an external TCM. I was imagining having to put in much more GM/Delco electronics and wiring to make it work properly. I can see how Ford PCM firmware supporting combinations not possible at the time could be an issue.

This is a lot different than my "old school" experience like sticking an Ecotec on to a VW bus transaxle where you only have to worry mechanical interfaces...