Well ill soon be pulling my trans and swapping to rwd with either a th400 or 4l80e. I dont drive on the highway so im not worried about having OD although it would be nice. Im just looking for some pros and cons of the th400 over the 4l80e. From what i gather a built 4l80e with converter will cost 4-5k, plus the tcm, lines, converter and what not. The th400 will run about 4k for the full swap. Not really sure where I want to go with this, or rebuild the 4l70e and keep rocking the awd a little longer. HMM.......