My wife's 2019 Grand Cherokee with 14,000 miles, 3.6, 8 speed, has momentary engine and speed surges while normal city street and highway driving, . This is new. There's no warning or pattern for the surge to happen. The surge lasts just a second or two. A google search mentions software update on Torque converter by one owner who said it was somewhat successful. Have you heard of this happening, are there any solutions? The car needs to go in for oil change and I want the surge problem addressed at that time.