Originally Posted by
BIGROB
Just the factory one. My truck is an 03' model which may be larger than some of the previous years.
I don't think torque converter slippage at 3rd gear speeds is a big factor on fluid temps.
The "driveability" of the truck is so much better with crisp shifting and a more responsive 3rd gear that I would have gladly added another cooler had I needed to. In my option Martin's valve body is a must do item if you plan on keeping that 46RE transmission in the truck. I think i paid $275 at the time and it was by far the best bang for the buck modification I've ever done.