Happy New Year to you and yours! I'm rebuilding a T-19 transmission for my Jeep CJ-7, replacing the T-5. Assuming the gears and case are in usable condition, I have a core.
I've read the T18 section of the CJ Rebuilder's Manual, and I have the Novak rebuild guide as well. From what I've seen, it certainly seems more basic than the T5. The mass is going to be a challenge if anything needs to be pressed into or out of the case!
I'm thrilled! This is how I envisioned the end result...Congrats, Case! Lesley and toddler should be relieved to have you back in their lives. Time to go family (safe) wheeling! You've got extraordinary reduction gearing now, should draw a big smile. Just remember to brake more in low range before downshifting to the lower gears.
How did you shorten the retainer end?...Noisier is not uncommon with a truck box, and you're spot on: attenuation with the tunnel cover removed is a huge fac