Just wanted to share that I finished the pinion seal job today. I ended up pulling mast and differential/tranny as an assembly. Split the diff and tranny. Then disassemble tranny. Removed and replaced pinion seal. Also replaced pinion bearings and races. Pulled forward and reverse clutch packs and replaced piston seals. Reassembled everything using permatex as suggested. I did this job on site at customer location. My hats off to you for getting this done in 16 hours. I was really cranking and it took me 20. Anyhow, thanks again for the input.