Totally a hypothetical question ;)

I have lost at least one Mopar trans to no kickdown/improperly adjusted kickdown and personally know of several more.

What happens is that the 2-3 shift starts taking too long and then slipping.
It gets progressively worse.
Eventually, instead of making that shift it just slips and will only be driveable if held in second.

If you absolutely have to drive a Mopar without kickdown, wire the linkage back so there is at least some pressure. This is kind of an art, because if you get it wrong, you can still lose the trans.