Was debating about installing a perma-cool standard remote trans filter kit in a Jeep with a 42re trans. The internal filter design is pretty much a rock stopper. However, I'm concerned about fluid flow when putting the kit inline with the ext. cooler. I'm also concerned about winter operation, the fluid won't gel up in the filter will it? It is ATF+4 so I'm thinking no. Never ran an ext. trans filter before looking for some input.