I have two John Deere 8430T tractors with Autofarm A5 sytems. The problem is that they don't want to hold a line. Tried recalibrating SST on tractors several times, adding ground straps to SST from Autofarm SA module. John Deere dealer not much help because of third party autosteer, but heard that deeres system isn't any better.
JD 8030T with Autofarm A5 steering drift
