Guaranteed to work 4l60e with stock tq converter came out of my 09 silverado ( still in it) 52000 miles I'm going to be pushing 650 when my turbo build is done, so I'm going to swap to 4l80e I will sell for 1000 and pay shipping up to 700 miles (will still chip in on shipping further out) or I need a core to get one built for my swap, , I will trade you a 100% guaranteed to work because its currently installed 4l60e with 52000 miles on it including stock tq converter from lubbock Texas. Willing to take a 2005 or newer 4l80e 2wd core shipped to my door as a straight trade as long as its rebuildable.