I know this was discussed a while ago and couldn't find the out come. My race truck body has 330,xxx miles on it and I'm sure the hydrobooster is tired as it's having a hard time holding the truck at the line. Yes I did the flush and it helped a little and the ABS system has all new fluids in it. I know at one point others where saying you could put a 2011 LML hydrobooster into the earlier model trucks and they were an improved until over the others. Any truth to this? Anyone has part numbers and such? I was thinking of doing hydro and power steering pump at the same time.