Your friends shop might have a trans power flush machine. I have used them before and they work great (not the x3 though). Essentially what you do is disconnect the trans cooler return line and hook up the machine to take the old fluid out while new fluid gets pumped back in while the engine is idling. They typically run off of the shop air compressor.
Last edited by x3brian; 01-17-2013 at 08:27 PM.