HI I HAVE JUST FINISHED A 1995 K2500 STANDARD CAB 4X4 6.5 DIESEL TO 5.7 TBI ENGINE SWAP.I HAD A 1995 K2500 XTRA CAB DONOR TRUCK THAT HAD 4L60E TRANSMISSION.I KEPT THE 4L80E TRANSMISSION AND PURCHASED NEW TORQUE CONVERTER AND TRUCK RUNS GREAT EXCEPT FOR SEEMS LIKE I HAVE NO FOURTH GEAR RUNS AT 3500RPM AT 55 TO 60 MPH I HAVE BOUGHT A MOATES BURN 2 AND NOT SURE WHAT I CAN DO ALSO HAVE ALL THE DIESEL ENGINE PARTS EXCEPT HEADS IM LOOKING TO SELL OR TRADE FOR A NICE TRANSMISSION CONTROLLER