I HAVE A 2014 CAT 289D WITH ABOUT 3000 HOURS AND THE RIDE IS TERRIBLE. MY PRIOR EXPERIENCE IS IN 277 & 277C MACHINES SO THE 289D CTL UC WILL BE A ROUGHER RIDE BUT THIS ONE IS NOT COMFORTABLE. I REPLACED THE BLOCK TRACKS WITH "Z" STYLE BAR TRACKS WITH VERY LITTLE IMPROVEMENT. CAT DEALER WILL CHECK TORSION AXLES AN REPLACE IF NEEDED FOR $8000. IF YOU HAVE A HIGH TIME 289D PLEASE DESCRIBE YOUR RIDE OR IF YOU HAVE SUGGESTIONS I'D BE HAPPY TO HEAR THEM. THANKS