I took my Chrysler Sebring Convertible to a local oil change shop that was running a $69.99 transmission flush, since my car was due, I took it in for the flush, I drove the car about 500 miles and noticed that when shifting from reverse to drive, the shift was very abrupt. It also started shifting gears abruptly at times, mainly when cold. I went to my trusted mechanic and he looked at the fluid and identified that the color was wrong for a Chrysler with ATF+4. I went to the oil change shop and they used Pennsoil Multi-vehicle ATF, that fluid does not state it is compatible with ATF+4 on the package, they assured me it was safe, but I demanded ATF+4. The shop agreed to do another flush and refill with ATF+4. The car is shifting how it should now, but my question is, did this cause damage to the transmission, or should I be fortunate I still have the original transmission at 120,000 miles?