I recently purchased and installed a 700r4 from Bowtieorverdrives (which I highly recommend that everyone does not do busniess with). I have had a few problems since I ordered the tranny but now only have one left that I can't figure out. Has soon as the car starts moving foward the speedo buries itself at like 160. I also hooked up my auto xray and it says the car is doing 255 mph. I called BTO and they said its not the tranny it has a be a ground or something, yet I've checked a few times and all the wires look to be good.