Originally Posted By CrystalPistol
I run my aux cooler in series with the OEM cooler in the return line to the transmission
Every instruction set I've read from a bunch of cooler and transmission vendors says to do it this way.
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)

'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.