The questions about what you need will depend on your TV (tow vehicle)ratings and optional equipment. The V6 versions were rated for something like 4,500 pounds, while the 5.4 V8 handles 6,500 pounds.
If your TV lacks a tow package I would strongly recommend adding a transmission cooler. Even if your towing in the flatlands a cooler is going to extend the life of the transmission. You also might check on some of the PTFE products that can help you engine and transmission. If you are laready using synthetic engine oil you can skip the PTFEs for the engine.
BTW, that is a great TM you have selected too. I think the 3124KS is TM's best design...
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