First off, I apologize for the novel..... So, my vert had been stored indoors long term, hadn't been driven in 4 years. Other than winterizing (checking anti-frz, using Stabil in the gas & pulling the battery), I did not do anything else. When I resurrected it a couple weeks ago, it fired right up. After letting the engine warm up for about 15 minutes I put it in gear to pull out of the shed. It's an AOD and other than having the tranny rebuilt back when it was a daily driver about 12 years ago (@ approx 100,000 miles) and adding a B&M performance shift kit the tranny has been great. When I shifted into Drive from Park for the first time in 4 years, it needed a bit more grunt than I recalled back in the day. The transmission "popped" into gear, I could hear it. That had never happened before. But then it seemed too drive fine. Now that I have my nw tires on I've been putting a few miles on every other day or so as time allows, but it is shifting erratically--holding gears too long/"power-shifting" when being driven normal and the throttle seemed to be sticking. I added a can of Seafoam Trans Tune for the shifting and also discovered the transmission kickdown bushing on the throttle plate was crumbling and allowing the cable to bind. With that replaced I drove the car again tonight around town and regular Drive was rough at first, but smoothed out and eventually got back to normal. So I then headed to the highway and tried out OD, which was fine until I hit about 50mph and the next shift didn't happen, it just revved. So I pulled over, put it back in D (which still worked fine) brought it home. Do I just need to give the Trans Tune more time and gentle miles to work its way through the entire tranny or do I have a serious problem?