Issues shifting into passing gear
I was on the last part of a road trip when I hit the gas to pass someone. Everything was fine until it tried to drop into passing gear. The engine hit about 4k RPMs and then it started to stutter. I took my foot off the gas and it continued to stutter for about 2 more seconds. The problem is reproducible. I can rev over 4k while in neutral and I can normally accelerate up to 80. I've recently changed plugs, wires, fuel filter, air filter, PCV and did an oil change. I've checked the trans fluid on the dipstick and it has enough fluid. Any suggestions before I drop the pan and have a look?