One last comment on the overdrive gears: wow. Best thing I've done to my diesel 80 in years. I like to drive 75-80 mph but the high rpm was driving me banana sandwich. Now I'm at 2700 at 80mph (255 tires). The noise level of the engine is 30% lower. Zero gear whine. First gear is a tad high but manageable. A h150 would make it perfect...