Do you have an aftermarket cooler?
http://www.bmracing.com/products/70...13000-btu-rating-black/?mk=&yr=&md=&smd=&eng=
## I use the above BM racing 70268 auto tranny cooler. It's 8.5" high x 11.25" wide x 3/4" thick. You can't go more than 3/4" thick..so all the 1.5" thick types are out of the equation. (Beware, their 70264 is 1.5" thick..too thick. Their 70255 is only 9800 BTU, 3/4" thick, only a few $ less. Nobody ever carries it. )
13,000 BTU rated. You can buy the exact same one just about any where like jegs or summit etc.
It's a stacked plate design... better than tube and fin. I installed it just below the ford oem auto tranny cooler... + plumbed it in series with the oem cooler. Its a popular item, even here in town. I bought mine at the local dyno place, good price at the time, and he had loads of em in stock.
Before, with ATF up to normal 170 deg F... mash the gas, blower on, ATF temps would shoot up to 201 F in just 5-9 secs. Now with the BM cooler installed, it only increases by 1-2 degs F at most... like from 170 to 172 max. Solved all my tranny heating issues, zero issues with it, built really well, all brazed and pressure tested etc. I took the readings with my aeroforce gauges... plugged into obd port.
I also installed a JDM engineering 5r55s catch can. Without the catch can, the 5r55s will puke out ATF all over the ground, when hot. JDM makes 2 x versions, one for the 05-09 cars, and the 2nd version is for the 2010. We mounted that close to the corner, on fender wall, on driver's side.
Also installed a PA ( performance automatic) deeper auto tranny pan. Holds an extra 4 qts. It's 2.1" deeper
(hangs lower than oem)..and is triple the weight, even though its made from aluminum. The aluminum is damned near 5/8" thick where it bolts on with a myriad of new, included SS hex head bolts. 3/8" thick x 3/8" tall aluminum fins run the entire length of the new al pan. Also came with a drain plug. Also comes with a locking style dipstick, that comes up next to the firewall, close to the battery. Opening on dipstick is plenty big enough to easily add ATF fluid if required.
Used some pressure on one side of oem cooler, and a vac pump on the other side of same oem cooler, to get all the old ford ATF out. Then installed new tranny cooler in series with oem cooler. Then re-filled with one helluva lot of RP max ATF.
This is the stuff you have to do to make the poor 5r55s survive. And mine is not built like the street fighter series, just plane oem. Even on those, you still need the deeper pan / extra cooler / catch can.
The oem pan is useless. With NO dipstick, you have no clue what the level is. Bitch to use fords method down below to check level..and add /refill. With no catch can, the levels can and will be way down, esp if it runs hot, using the blower. Then it runs hotter still.
BTW, I bought and used a new ford gasket for the new, deeper pan. Don't re-use the old junk. Also tranny filter cleaned etc.