Ram tranny problems

I'm not second guessing myself I guess its just lack of experience. Trannys are one thing I've never got involved with. I only did one in school and it turned out good. I just want to get the truck ready for winter. I want to use it to haul the dart to the track next year too. I should have never got rid of my 05 hemi ram for a blazer. It was the truck or my house I needed money down but then again the kids love it here and it makes it worth it. I just missed the truck so I got this one.