I'm temporarily detained in Houston, Tx, with quite a bit of free time on my hands, and I got to thinking about the cooling of my 47RE. I'd like to add an aux transmission cooler without paying out the nose for BD cooler plus install kit (no offense to BD, just not looking to drop 1/2 the price of my transmission on a cooler). After looking around here, ebay, and summit, I have a few ideas.
But first, knowledge to be taken into consideration: I'm MAYBE making more than 100 hp over factory and drive conservatively, my transmission is a 47RE, rebuild 10-15k miles ago due to a torque converter cooler melt down. Had it rebuild to factory spec at shop that I trust using his house brand of parts. Whilst he was rebuilding it, I removed the broken torque converter cooler and bypassed it with custom made hydraulic hoses on the ATF+4 side and silicon based hoses on the coolant side, leaving the Air to fluid cooler near the radiator as my cooling unit. I do not believe (trans temp gauge has yet to be bought or installed but I found one I'm buying) I haven't had an issue of overheating the trans yet, but with the Houston traffic I'm a bit worried. Since the TC cooler was designed to cool the trans at low speeds (not much air passing over the air cooler), I'm toying with these ideas.
Buy a cooler that either universal or from another vehicle, mount it in location X (input appreciated) and wire in an appropriately sized 12 volt fan (on toggle or temp?) to cool the fluid even at stop and go speeds. ($100 ballpark)
Flex-a-lite 3826 Extra Heavy Duty Transmission Cooler | eBay
12" 12 VOLT BLACK SLIM REVERSIBLE ELECTRIC COOLING RADIATOR FAN+BRACKETS | eBay
Buy a universal cooler, with fan already installed, mount in location X and wire in for either toggle usage or temperature setting. ($150 ballpark)
Derale 12732 Remote Transmission Cooler | eBay
Buy one or two coolers, not add a fan to either and mount in location X. Increasing cooling capacity overall but not more than 1st or 2nd plan ($50 ballpark)
Tranny cooler,91.5-93 dodge cummins | eBay
I will be adding a spin on trans filter regardless of the addition of these cooling units, but possibly inline with one of their return lines.