With regards to upgrading the trans to hold more power; Am I already asking my trans to hold alot of power when I hitch up my 15000 lb 5th wheel and yank it up the mountain pass at 60 + mph? Or is that different? If the stock trans can handle 400 hp empty then what can it handle with all that weight on it? Maybe I'm thinking wrong but would like some opinions. Thanks, Ed.

Still plan on T-go jr minimum tho'.