This perhaps is why I'm a bit confused on these things. I try to do as much research as I can but eventually the waters get muddy. Here is an exerpt from a web site (link below), it is the fourth paragraph:
Quote:
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There were many changes made during the production of the NV4500; two main variations were the NV4500LD, which was used with Dodge V8s and GM gas and diesel engines, and the NV4500HD, which was used in Dodge trucks powered by the Cummins diesel and V10 gas engines. The HD (Heavy Duty) version was unveiled in 1994, and had an increased input torque rating of 460 lb-ft, thanks partly to a 1 1/4” ten-spline input shaft.
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http://www.allpar.com/mopar/transmissions/NV45
Thank you for all the input and replies.