I have extra sets of fuel filters and I would give that a shot. FYI, I did run a can of diesel purge maybe 6mths ago and changed both filters afterwards but I might have had a bad batch of diesel afterwards. My problem with checking the trans fluid accurately now is the car could not be moved enough to warm the fluid up to temp, so how could I be sure? And does anyone have an answer to the glow plug light coming on while driving? The glow plugs are working I know. I have no problems starting the car in winter, even though it might take at least two cycles when it is 5F outside.