I have just finished swapping a c4 from my 66 fairlane into my 67 mustang. The fairlane was a column shift, so I swapped the shift lever out for one from a 1979 c4 in order to hook up properly to a floor shifter. For some odd reason my reverse quit working all of a sudden, and the tranny will not shift from 2nd to 3rd. I am looking into the reverse problem, but after reading through some old posts I think the 2nd into 3rd may be my ignorance more than a mechanical problem. The old posts refer to a green dot shifter, and I am wondering if by using a floor shifter and bezel for a 67 where the drive immediately past nuetral was what I assumed to be the 2nd into 3rd shift, is actually the manual 2nd gear position on my 66 C4? Also, if it is just a matter of having my shift patterns mixed up, would swapping a valve body from a 67 or later C4 fix the matter? I have a valve body from a 79 C4 that I could swap in if this is the case. Thanks in advance for any input.