I see you already have the tranny cooler installed, i still have'nt gotten mine on yet (shame on me) but i have one on my cherokee and mine was placed in series before the the stock cooler. The theory behind this is on extremely cold days the stock cooler will help keep the fluid from being overcooled which from what i understand is a bad thing though not nearly as bad as the fluid overheating(can anyone confirm the fact that overcoolings a bad idea?)but i also know people ( i'm sure many ppl on here) who have bypassed the stock cooler with no sign of problems with the exception one whos fluid has recently gotten dark but does not smell burnt so until he actually figures out what causes it i can't blame it on the cooler. Just somthing to think about.