Sorry I meant coolant reservoir for actual engine ..relocating it for more battery room. I should of specified. I have a Hayden 677 cooler now routed on hot line. I've seen a consistent 8 to 13 degree drop in trans temp. I seen another at least another 2 after I got radiator flush about 3 weeks ago. I've been using my torque pro app and a bafx bluetooth obd2 reader. I think if I do e fan upgrade it would drop temps even more. Especially in stop and go traffic. My temps can get really high in 95+ if I sit in traffic for a hr. I may possibly re route trans cooler to cold side and upgrade to a bigger Hayden 679 cooler

 

It can be done with a 51r