Does the TH400 have an inherent strength advantage by basic design, or is it like everything else Chevy, it's the strength designed into it by the aftermarket (aftermarket case of example) that makes it better?
In addition to the large aftermarket, the TH400 has a power-on-power design where upshifting simply involves applying more clutches. A 727 has to deal with apply-release mechanics in the 2-3 overlap, which can break things or rapidly wear parts if managed improperly.
