About 3-4-5-6 months ago ( not even sure ), I was at the track and sheared a passenger side motor mount bolt. When the mount broke, it let the motor move enough that it ripped the CV axle boot. After driving it all that time with the grease "released" from it, the axle had a lot of slop in it. I even thought it was causing false knock at one point during tuning. On the 7th run ( after begging to get lined up against a Focus ST ( and said Focus ST owner getting upset, knowing what was coming )), it popped at the line. Car didn't roll 1ft forward.
Triple A towed it home, then ford towed it to a dealership that I had hoped actually wanted to work on the car ( aka make money ). I was mistaken. Like all FWD turbo cars, tech's are scared to death. They took one glance as it and wanted nothing to do with warranty pay from ford. They wanted my debit card for "customer pay". Needless to say.... That ant happening. A CV axle is barely a job at all. Anyone can do it. So I ordered the part from a 3rd party and I'll install it myself. Dealership makes $0. Ford makes $0 on the part. And I'll make sure I never goto that dealership again.
On one hand... I get it. You play, you pay. I knew that going in. I'm completely capable of doing the work myself, and while the axle isn't super cheap, its not insane subaru or benz prices either. And I know it will be done right instead of by someone making $12 an hour to change oil.
On the other hand.... Ford cheap grade5 motor mount bolt sheared, caused the boot to fail, caused the axle to fail. While the car is making really nice power, its not 300whp. I wasn't on drag radials ( which in my experience tears up more stuff than anything at the track on a FWD car ). If ford built a car that didn't wheel hop, it woudn't break bolts or axles. Who's fault is it really? Lol.
Anyway. This would never happen on the street and prob not happen at the strip if the axle hub was no exposed to excess slop from being fan without grease for such a long while. My srt4 used to break CV axle boots just from shear accelerating force (spinning the tires at very high speeds, like going from 15mph to 55mph in a blink ). And those axles wouldn't even go 3 months without grease. So I think we have some pretty high quality ones.