I'm running a 5.0 Efi with aod. Installed winters shifter and trans started acting up. Won't shift properly and requires a high rpm to engage into 1st gear, runs through gears quickly and shifts hard. Tv cable had some janky fab done to the adjustment block on the cable so I pulled a used one from a junkyard. Still shifting hard and still requiring high rpm. Tried all the adjustment info I found on YouTube and mustang forums with no success in fixing my problem. Is there something I'm missing, are these cables notoriously diff to adjust or is a new one my best bet? Any suggestions would be greatly appreciated