Krazykoncept

Aloha guys and gals. I’m having an issue with my truck. I have a Benz semi truck. I installed the mfc03 on a fly sky fsgt6. I got every thing to work lights and sounds. It’s I can’t go into high gear without my steering servo start glitching like crazy. If I shift it into low or middle gear it steers ok no glitch. I have only tried changing out the servo yet. Didn’t try to plug direct to the receiver to eliminate the mfc03. Going to try that next.