I never heard of Trany problems in old Mopars, The Torque Flite automatics were bullet proof. Combine that with the slant 6 and it would run forever. The straight 6 in older Jeeps was a tuff one also, then again the ole Chevy Stove Bolt 6 was great too; I'm seeing a pattern here. I think that basicly the old 6's didn't have enough power to break anything because of the poor fuel delivery from a single carb. Once Port Fuel injection came along a straight 6 made good power, just like the multi carb European 6's.
