Hello all I bought a 2003 f-150 and was told it originally had a 4.6 had nothing when I got it so I pulled the engine and transmission out of my 1999 f-150 that was 4.6 swapped out the computer ignition and cluster truck runs fine goes into drive but will not shift when driving found out the 2003 had a 5.4 originally what do I need to do to get the transmission to shift while driving thanks in advance for the help