Had anyone had their Auto gearbox break?

[5.0 ED]

I've had a stock BTR behind a turbo 6 pushing 271rwkw's and 1100nm touque, auto handle it fine no probs with a suitable electronic shift kit, i have only even broken 1 off these auto's any other problems have been caused by heat/wear/slipping on changes due to not doing a shift kit.

The one i broke had a 5l pushing 219rwkw's and was dropped into gear at 8000rpm, tranny/diff both went bang in unisen, made a hell of a mess. destroyed the diff, blew the casing apart from flying bits. As for the auto it broke the one way lock up bearing which cant remember what its called, then bits of it jammed the oil pump and broke the touque converter tungs which drive the oil pump. This one way bearing is the weakest part i can find in a BTR.

I've heard of testings done on standard BTR's, i think nizpro did one, and they break at over 700hp.