your transmission issue (well problem ) Is a Failed Manufacture defect most likely bad assembly or a defective part. Your Catastrophic Instant failure is not in any way Related to the transmission issues (mostly about shifting and thumping , Gear hunting for lack of better terms) that you see on these forums over and over. My personal opinion on most of those complaints are people expecting there truck to operate like a car or SUV. My company over the years have actually had better luck with Remanufactured (crate) Transmissions then brand new ones.. You may be getting a upgrade.
Thank you for reading.. Super sorry it happened but your truck is Mechanical it will be good as new when repaired.
Erica