Truck has 240,000Km on it, New engine..so I want to keep it a while yet.I have changed the fluid one other time around 90,000KM and again at 225,000KM.Sometimes when I let off on the trhottle as its gearing itself down, you'll hear a bit of a thump...not much, but like something is sticking? you know? The going into drive in the morning has been more often a problem, but it always goes in...just sit a minute and put the gear selector to reverse then park, then drive, then give it a slight amount of throttle and it will engage and the your off and running fine the rest of the day. I added some Lucas tranny treatment, but its still the same?