yes
The difference between dexron 3 g and dexron 3 h is that dexron 3 g is used to be the factory fill quality. Dexron 3 g was the requirement for service fill quality.
The primary difference between Dexron 2 and Dexron 3 transmission fluid is in their formulation. Dexron 3 includes a number of corrosion inhibitors to prolong the life of components.
Dexron is the GM name, while Mercon is the Ford name. Dexron III and Mercon V are essentially the same fluid. They make mixed fluids that are acceptable in either, so I wouldn't worry about it.
Dexron Mercon 3
atf dexron mercon 3 is what it calls for.
You want to use dexron / mercon 3
Mercon V and Dexron III are not fully compatible, as they are designed for different specifications and applications. Mercon V is a Ford specification, while Dexron III is a General Motors specification. Mixing them can lead to performance issues or damage in some transmissions, so it's best to use the fluid specified by the manufacturer of your vehicle. Always consult your vehicle's owner manual for the recommended transmission fluid.
Mercon III is for older trucks up to ~2000, for an 05 truck I'd go Mercon V. Check with the dealer or knowledgeable tranny shop.
Your transmission takes Dexron 3. Make sure you check it with the vehicle in park when the car is warmed up. The fact that it has overdrive does not matter, it is still Dexron 3, sometimes marker Dexron 3 / Mercon.
You can use ATF+3 with all older Chrysler transmissions. Do not use ATF+4 Dexron, Mercon, or any other fluid.
The recommended automatic transmission fluid is DEXRON-MERCON, and it requires 3 quarts.