722.6 w210 stall speed
722.6 w210 stall speed
I'm following along... IMHO, I'd be suspect of a TC shop said the TC was fine and then YOU (a non TC expert), finds a 4" crack? I'm not a TC expert myself and I would seek an informed opinion with your new revelation. At least to me it would seem plausible that the crack is such that lock up pressure and thus "lock-up" could not be maintained, this could explain overheating.
As an side- the heat generation may not have come from the clutches friction surface. Without lock-up, it's my understanding that just the fluid action acting between the impellor, stator and the turbine generates heat... it may have been a combination of factors contributing to the temperature rise.