The TTB is inherently weak - if you plan to "beat the snot out of the truck" then carry a lot of spare front end parts so you can get home or swap to a solid.
You could probably ask the swap fokes here to send you their TTB axels, outter shafts U-joints,,, the stuff that breakes a lot,, etc.. for the cost of shipping as most of us just take it to the dump anyway - then you can wait a while but still have some spares when things break,,, as things will break.
but be careful on how much you spend on the TTB front end as when you swap to solid you will just throw it away.
Sorry, I can't resist,,, :thumbup
I have a D44 - completely rebuilt by Papola Performance / Extream Performance in Santa Rosa Ca. 707 578 1115 - every thing new ARB, 5:38, used install kit allnew bearings, seals, balljoints, U joints, Warn premium hub kit, new rotors, converted to 8 lug, still have old lug hus if you want to convert back - this is ready to go just need calapers - I will sell it for less than the cost of the parts.
:drinkbud