My wife's 2010 Wrangler RHD auto seems to shift early when going about 40 mph and it pulls the engine down to about 1200 rpms or less. When this happens , it makes a sound / vibration that is "new" to the wife.
I have told her to run the ECO off , no lugging, But it only started doing this since 90,000 miles. Is there a computer reflash available that will address this. She seems to think the tranny is going., I do not believe this.
Engine has been maintained and tuned up.