Got a buddy (here in BR) that went through at least three 4L60Es (w/ a few rebuilds) that were supposedly "built". After the last transmission bit the dust, he decided to spend the $3K (think that's what he said the price was) on the FLT Stage 5 . Put a vac mod on it, and has held the LQ9 (w/ 223/226 cam, springs, rods) pretty nicely. Truck runs 13.7s on motor... and it's an RCSB Z71 that gets sideways in 4hi (yes, 4hi not lo).