One particular model Ford (F150) comes in a version with a V8 that is a bit too strong for the frame. If you use it for what it's made (pull heavy stuff) at some point the transmission will simply drop out from underneath because the retainer bracket at the back is too light for the job. This happened to me (no warranty, they claimed the vehicle was not meant for heavy duty, in spite of being sold exactly as such...). I can easily imagine your 'tranny drops out from underneath' after renting your car out to someone that pushes that car a bit further than you normally do.

I'm still boycotting Ford over that whole affair, what a nonsense. Stick a 350+ HP engine in a car and then expect it to be used for shopping only...