alright, well i tried the "disconnect both transmission lines, put them in a bucket and briefly start the engine" trick to try and figure out which transmission line was "send" and which was "return" - and i got an equal mess out of both lines..... this left me baffled and nobody on here has really described the trans fluid flow direction.....
with that said... i understand nobody wants to give potentially false information about the fluid flow because when somebody else hooks their filter up wrong they'll come here and start blaming other people's directions.... ANYWAY....
after skimming a few other sites online i found where someone said that the 5R55E transmission has a thermostat that doesnt send trans fluid to the cooler lines until the transmission is hot, so that seemed to explain why i got fluid just running out of both lines when i tried to check the flow direction on my COLD transmission.... upon further reading it was explained that the transmission fluid ran this direction -
TRANSMISSION -> TOP OF RADIATOR -> BOTTOM OF RADIATOR -> FACTORY AUX COOLER -> TRANSMISSION
(here is my source for the information in the above paragraph -
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1643295)
so, on my
5R55E automatic transmission on my
2000 FORD EXPLORER SPORT i added the Summit Aux Filter to the fluid flow path in this manner -
TRANSMISSION -> TOP OF RADIATOR -> BOTTOM OF RADIATOR -> SUMMIT AUX FILTER -> FACTORY AUX COOLER -> TRANSMISSION
I cannot guarantee that your transmission fluid flows through the components in the same direction and order as mine does, but i can SUGGEST that if you have the 5R55E Automatic transmission the fluid MIGHT possibly run in the same direction as mine. After hooking up my Auxiliary Transmission Filter kit in the fashion described above, i drove for about 9 miles with the engine running for around 25 minutes (i left it running as i went inside Advance Auto for some more Mercon V) with no leaks or transmission problems. My truck shifted perfectly through all 5 Gears with no hesitation, shuddering or slipping. It also shifted, without hesitation, shuddering or slipping, into Reverse. This leads me to believe my Aux Filter Kit is installed correctly. feel free to use this information for reference at your own risk, i'm not responsible if you hook your filter up backwards and screw something up.
hopefully this information is helpful, i'm sorry for being excessively wordy, i'm trying to cover all the bases, provide as much information as possible but still cover my own butt in the case that something posted here is incorrect. Photos of my install to come shortly.....