i would say he is not familiar with the trans if he is saying that. When you get VERY extreme you normally break the input shaft of a NV4500 and it is rated just of 14k GWV Rating i beleive. The 3053 is 26K GWV Rating. The 3053 was also used in the one ton truck catagory of the land speed record. I spoke to a guy running 900ftlb in a deuce with this trans and has had no problems with it or the clutch holding. And a deuce ways more than your truck would ever be fully loaded. I see no problem with the trans holding. I am looking at running a 6BT,HX40,370's,191 DV, 4inch exhaust with a 100 plate and don't think i will come close to hurting this trans. The guys over at SteelSoldiers would be a better source of experience about these trans holding up.