Hi I have a 1989 Mustang GT 5.0 with AD transmission automatic at first it was starting to read really high just to slip into second gear about 4000 RPM's is when it finally slip into second now it won't go into 2nd or 3rd at all I've rubbed it all the way up to 7000 RPMs and it's still will not shift for the life of me need help ASAP please reply can't figure it out I replaced speed sensor throttle position sensor about to put new new neutral safety switch on hoping that that cures it but broke down on the side of the road need help fast????!!!!?
Last edited: