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, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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