I think they may be OK for a stock car or truck that burns gas and does not tow. I am sure they are cheaper, and that may come in to play for some, but when you decide to make a TQ change, it is a major investment. The labor to do the swap is normally in the 500-600 dollar range, and is not something you would like to do very often. If it was me, and yes I have been there, I would opt for the brand name. The diesel automatic is in a segment of there own, with regard to transmissions. I think they require much more thought and design then other transmissions and torque converters. We need lower rpm lockup, and enough surface area and line pressure to hold. This is one area I would not skimp on, do it once and do it right.