I can't tell what he is talking about.
The MTX-75 is overall a pretty strong trans. It does have it's weaknesses.
The weakest part is the final drive or differential. It uses a two pinion differential whild the same trans in some european truck applications uses a four pinion differential. As far as I know, no one has figured out how to import the four pinion differential. Those who want to strengthen this area usually install a limited slip differential. Usually a Quaffe or a Torson. They are not only stronger, but also add limited slip. The main time this weakness becomes a problem is if you subject the car to severe wheel hop with a hard acceleration pull away from a stop.
The best cure for that is to not get involved with hard acceleration from a dead stop. It also helps to install the motor mount stiffeners that are sold by BAT and SP Motorsports.
The best advise is to remember that the CSVT is a strong road car, not a drag racer. Learn to love the car for what it is and avoid tire burning starts.
The factory has upgraded the trans in later models with imporvements in the synchros (especially 3rd gear), shift forks, and so on. A complete trans from a 2000 V6 Contour, Mystique, or Cougar would have all of those upgrades (but the same differential).