Okay guys,need some help. Just followed the procedures to change transmission fluid in my 2000 7.3 4x4 excursion. It has 250000 miles on it. Found lots of crud on magnet,looked like fur and fluid was burnt,very dark and bad smell. Was driving home from long trip and od light started flashing and started shifting weird, that's what brought this on. So went to do the flush after dropping pan and changing filter by undoing rear line going into transmission and connected my tubing, started truck and fluid shot out of transmission all over the place and not out the line. ...what causes this,is my cooler blocked? ? Also the front of the transmission appears to have a lot of fluid all over it where it connects to block, And with crud all over magnet is it time for the shop? ??