I have a 2011 Chevy Cruze Eco, automatic with 99,000 miles on it. I have posted before about an engine problem that I was having. After six months of terrifying driving, my engine was finally fixed late February. The head mechanic at the dealership was shocked when I pulled in and the engine sounded like it was about to blow up, this is what I had been telling them for six months and numerous trips to the dealership. The mechanic couldn't diagnose the exact problem so they just put on a new cylinder head and a new intake manifold because a valve was MISSING. I have had no engine troubles since then and I am very pleased with that outcome. However, when this issue with my engine was happening it would cause my transmission to shift hard and jerk suddenly. I mentioned that to the service writers when I went in for the engine issue. Since then my warranty has expired and I am stuck with a transmission that now slips into third and occasionally grabs 5th very hard. I've taken it to the dealership twice and they say everything is fine. I had it flushed as the mechanic suggested, no change. Now I'm stuck with a vehicle that I do not trust with no warranty. Any suggestions? I've been granted a credit by GM IF it gets diagnosed. My Senior Advisor has not called me back in two weeks.