Good point.
The next thing you know you're on the phone with your insurance company trying to explain how the car just burnt to the ground out of the blue.
I goofed up on the first transmission I replaced. It was a c6 in a 70' f100. Didn't have the torque in all the way, couldn't get bellhousing to sit straight against the block. Figured the dowel pins were just crusty and just kept cranking on the bolts til a chunk of the bellhousing landed on the floor. I called a few people smarter than myself and they said I probably screwed the pump. Pulled it back out, made sure the torque converter was seated all the way then installed it and it worked.
I've also replaced a few transmission where I go to bolt up a bellhousing and not notice that the alignment/dowel pins from the old transmission stayed in the block and the new transmission had them in the bellhousing. This happened in a Mirage I'm sure.
Mirage videos:
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)