I've been looking for another used truck. We have a couple of the 2000-2002 VNL64T200's, darn good trucks for what we use them for and cheap to buy. I was looking at newer trucks with Ishift and never realized they were making the same 200 series up until at least 2015. When did the 300 series come out, wasn't that late 2000's. I'm surprised they made both models as they are so similar. What are the differences between them, is it the same frame and axles?