It has a cast iron case, aluminum bellhousing and tailhousing. One spec I saw online said 195lbs dry. All I know is that I can pick it up myself. (Can, not should, and not recommended.) The NV3500 is 110lbs wet. So we are talking a roughly 2% change in the overall vehicle weight.
One of the advantages of the NV4500 that I alluded to in my previous post is that first is so low (6.34 or 5.61) that you can put very tall rear end gears in it, and still be able to take off under load fine. The NV3500 has 4.02 or 3.49 first gear.
Oh, and my NV4500 waiting to take the place of the 4l60 in my 1991 k2500LD.
