Was asked to look at a 400FA today, whether its in ESP or Auto mode I put it into drive or reverse, the transmission only partially engages, the vehicle creeps forward or backward and you can hear the gears spinning but not catching on from the front of the engine around where the little motor(shift motor?) on the left side is. I took the motor off and there is a geared shaft that sits in the motor and goes into the engine, the teeth on either end do not appear to have any damage or wear. I thought that maybe the cable from the shifter down to the left rear of the engine is connected may be out of adjustment, but it doesn’t look like its ever moved or slipped at all and I don’t want to start pulling things apart until I get some advice. Anyone have any idea what might be the problem>