Might be a problem with the wiring pinned wrong. Could be the wrong or bad tune. Does the trans have enough fluid?Can someone please help. 5.3 in 92 Land Cruiser, 96% done. Fires right up, computer programed, revs great, and transmission will not shift after 1st gear. No second, no 3rd ,4th. What could be wrong? The speed sensor is on the adapter kit, Marks 4wd