They say your transmission fluid starts breaking down when it hits 200 degrees. Each 20 degree drop in operating temp doubles the life of your fluid and your transmission. So I like to shoot for operating at 165 or less to extend transmission life.
The two popular choices in transmission coolers is the Tru-Cool Max Cooler, and the 6.0 transmission cooler. The stock cooler has 9 rows, the Tru-Cool Max has 13 rows, and the 6.0 has two models, 26 or 31 rows. I bought the Tru-Cool Max cooler from Dieselsite. It's a nice kit and is inexpensive @ $130. Link
It lowered my temperatures, but I haul a heavy camper and I still get close to 200 degrees on long mountain passes. I wish I had purchased the more expensive 6.0 cooler. It's cheap insurance.
I recently added the Delrale deep transmission pan from RiffRaff. Link
. It's a deeper pan that adds an additional 5 quarts of fluid and has 9 air tubes that run through the fluid to help cool it. It's a nice unit. My transmission temps are noticeably cooler, but I haven't pulled any mountain passes with it yet to know if it did the trick.
At the same time, I installed a PHP hydra, and a John Wood Valve Body. The Hydra was on about a week before the valve body. My shop wouldn't install the PHP so I put it on myself about a week before the transmission valve body. The PHP made noticeable improvements in the shifting. By noticeable, they seemed shorter, and smoother. When I got the JW Valve Body on the next week, I didn't notice any difference, though I suspect I would have if I didn't have the PHP.
00 F350 Lariat CC, DRW, 2wd, 7.3 , Auto, Tru-Cool MAX tCooler, Delrale Deep Cooling Pan, JW Valve Body, aFe Stage II Intake, aFe 4” Turbo Back, Pillar Mount Gshift Gauges (Pyro, Boost, Trans), GTP38R, Barder Billet Wheel, Bellowed Pipes, EBPV pedestal, PHP Hydra, Riff Raff FRX, HPX, EBP, Swamps HV/HF IDM, Dieselsite Max AC. 2014 Lance 1191 Camper, Supersprings, HD Timbrens, Sumosprings, Front+Rear 1.5” Sway Bars, Monroe Gas Magnum Shocks, 19.5" Vision Rims, Centramatics, Sumitomo 16 Ply.
Last edited by ZRX-Steve; 06-11-2014 at 04:43 PM.