Unless you get a full "heavy duty" rebuild, there are no bolt-on parts you can add to the transmission to make it stronger (valve body, torque converter, etc.). None of these parts make the transmission itself any stronger.
A larger transmission pan won't do anything but add fluid capacity. It won't add strength or cooling efficiency as there is just more hot fluid to extract heat from at that point.
The transmission cooler you have stock will be a little guy located between the A/C condenser and the intercooler near the bottom. It never hurts to add a bigger cooler.
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes.
SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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