Decided to go with the Lifetime replacement. They are still all over the tire issue, tempted to put my 315s on and claim they are 33"s... (I'm sure they measure close.) On the other hand, been wanting to do gears since new, but I never thought I would live somewhere low altitude/flat where 6th actually was useful with 4.10s.
Diagnostics showed worn OD clutches, leaking valve body, etc. ( I had P0729, P0735, P0871, flaring, stumbling and occasional limp mode so I wasn't surprised.) Disappointing considering the truck only has 97k miles and the transmission was never over 172 deg. I also never beat on it, and only ever towed my 2nd gen with it once. My old 4L85E had over 200k miles when I sold it, and still shifted fine. I had beat on it, lots of wide open towing with the BBC bouncing off the rev limiter in first for 30 minutes straight. Often saw 225 degrees. Probably had 40-50k miles towing, all 11k lb trailer (2nd gen on 4k lb trailer) or heavier (2 rigs on 34' trailer, somewhere around 15klb.)
That being said, my first Dodge transmission (46RE) only made it about 50k miles prior to it's first T/C, valve body etc. replacement.