Oh boy.........
Got off the phone with Jeff, he said that on their second obstacle Carl and Vaghn's buggy sheared the bolts holding the transfercase to the transmission, blowing up the TH350's case and output shaft in the process. Yuck. To add injury to insult, two of their friends got run over by a competitor's vehicle when the throttle stuck and it went off the course. The only online sources of info I have found so far are on www.Off-Road.com.