Thanks for the info. I will add another. Cascade transmission machines 48RE internals- 6 pinion steel planet gears, increased capacity clutch packs, etc to fit the regular 46rh. Parts they have allow for up to 10 clutches in the OD unit. I think you can buy entire already assembled overdrive units from them, and the rest is basically like building a 727.
https://www.cascadetransmissionparts.com/ So it looks like it is a great source for those parts, combined with one of the billet TC suppliers it would make a good kit.
I've built 3 manuals, but never even considered a complete auto tear-down - one thing I have not done is look for a local (So Cal) guy/shop to do a build from parts...
Completely un-ironically, my 97 RAM just threw a P0740 code, so I need to have the TC clutch system looked at. Ugg.
