I Have IT
DL650K7. I am told the fix for this to adjust the computer in dealer mode, I think to make it less sensitive to the Throttle Position Sensor. I don't know if the TPS itself can be adjusted but it would stop bucking if the fuel flow did not go up and down. I have learned to live with it. It has always been a problem for me on 90 deg left turns in 1st or second gear. I learned to apply some rear brake just before I add some power at turn in to the turn. The brake smooths the bucking, which disappears anyway when enough throttle is turned in. I was quoted $450 to fix this with a special computer program.