Had the car for about a year now and it has about 270k miles on it. Just recently replaced the shift solenoids for a code 63. Took it for a test run then the car starts to stutter from a stop. Basically step on the gas to accelerate and the cars decides to just stutter and forces me to pull over. Not sure if this is a transmission problem again or an engine one this time. Has anyone come across this or have any ideas?