Well i found the problem or the reason why i was braking my 4l60s the suspensin was to soft and my trans pressure was too high.I wont be needing the 4l80e any more so im selling it.If u have a 5.3 silverado or sierra it will just bolt up and the only thing u will need is a re tune to get the 4l80 trans file tune.It comes with the cross member the adapter harness if ur running a l60e and the trans with a circle d converter.If u take it to circle d they will clean it for free since its never been opend.The 4l80e was built by juans transmissins and i got a shift kit on it too let me know 281 777 6831.
saw this on another forum...thast a deal..