You're not fighting the pump, you're fighting the fluid movement.
Best way to test would be to drain the fluid, then reconnect the hoses. You're probably still going to have a difficult time with it, though. Fluid doesn't make up that much of the difference.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
|