[Big Dave]

Frank Lee posted:
“…that heavy-dutiness means big heavy innards which means more internal drag.”

Big Dave says:
Indeed so.

If I were not backed into a corner by lack of better options, I would have used something else. I thought of swapping in a T-56 but it did not have the torque rating and bellhousing size necessary for an International 444 engine.

I do occasionally tow trailers and haul fairly heavy bed loads. That and the engines capability of making enormous torque for protracted periods of time would make scrap metal of something lighter.


This is why I recommended t_vago use a T-56. It is lighter than a GV (and less expensive). There is a variant of the T-56 (Tremec 6060) that is used in Vipers and Z06 Corvettes that will stand up to anything his engine and truck can dish out and still give him a huge 0.5:1 OD ratio.