I stumbled arcoss this info on couple of sites
NV4500: General Information:
In 1992 Dodge and General Motors trucks started appearing in showrooms with one of the most versatile transmissions ever to be offered in a production truck: the New Venture Gear 4500. General Motors applications include it as an option in 3/4 and 1-ton full size trucks. Dodge standard duty units come in trucks with the 5.2 and 5.9 liter engine, while Dodge HD versions are used with Cummins diesels and V10’s.
Be kinda nice to find a nv4500 int he tunnel