Hey everyone, general info seems dead for me and this seems like a performance issue to me so here goes. Bought a 2001 ram 5.9, 46re 4x4 hesitates going into gear like select drive or reverse and it sits for a second then grabs. Previous owner disclosed before purchase that it slipped once at highway speed cruising back from Vermont. 120k miles, fluid looks old will service. What do y’all think, try a full flush and band adjustment and hope for the best or is this a bigger issue?