Any help at all is greatly appreciated. E40 ecm hooked to t42 tcm in swap. Can't get it to pickup speedo no matter what I do. I can go into vcm scanner and see output rpm on transmission side. I'm at my wits end. Changed everything I can possibly think of. 2006 gto engine, 4L80e trans, BP harness and T42 tcmzollo4.hpt