The Weak Point is ABSOLUTLY the Carrier bearing and the Bearing Brace point.
I have suspicions this particular failure was a result of a Heavy Handed AWD Dyno and a weakened brace point from the first failure. What really pisses me off is I just put a Brand new CORSA Cat back on the Car, ( the previous one was mangled by the last failure ), and it is now banged up all to hell.
For anyone who is curious, Both Shafts were of the OEM Ford variety. I had previously reached out to VooDoochikin [size=78%]
https://kerbid.com/[/size] ; to ask about upgrading the Carrier bearing, even bought a used Driveshaft and had it sent to him to see if it was doable. But alas the OEM carrier is molded onto the shaft.
If the DORMAN shaft is FULLY serviceable i would re-approach, but that does not solve the issue of the weak mount point...
The first failure occurred at 170 MPH, and was due purely to Over speed. This second failure happened at around 115 MPH... so my money is on Weakness of the Welds from the previous repair and or a misalignment at the Carrier mount. Both Shafts Broke in the EXACT Same location.
I may just run my car FWD only again for awhile... I need a reliable Car here in Romania, (i moved), i cant be dealing with custom shaft issues here...
On a positive note the car made 530+ horse and over 600 ft pounds on the last dyno run at time of failure...
Once i get all my House hold goods here i can post pictures if anyone wants...