I have a 2000 3.8L supercharged. The car started over heating so I danged the thermostat twice flushed it and back flushed it due to sludge that was in the cooling system replaced with green antifreeze. Car is still over heating but it will only over heat one time and than does not over heat but the temp. Still fluctuates quite a bit. Somebody told me its the head gasket. Is it? I also checked tranny fluid and it was not reading on the dip stick so i added teanny fluid a little at a time and it never read on. Dip stick i put four quarts in it. Than checked tranny fluid again and it was a light pink color can this be causing my over heating problems?