My 1996 Checy Z71 4L60E tranny has destroyed itself for the second time. 1st time at 52,000 miles and now at 120,000 miles. Chevy factory rep told me that GM life span is 100.000 miles and then are considered of no value to them. I don't remember ever hearing a dealer tell me that. After talking to the factory rep and him telling me that my truck has too many miles and is to old for them to do anything about helping me with a new tranny he did tell me that they would give me a good trade in. I would like to know if anyone else out there has had problems with this tranny?