I am in to this problem about $400 without any resolution and the 960 goes back into the shop on Tuesday. This is my wife's car and I have been driving it for a couple of weeks and she is right the hesitation is really bad. When the 960 starts up and runs for one minute, all is well, from that point on until the car is 100% up to temp it goes from stall to tire burn to get away from the stop sign. In other words, you have to hammer the gas to get into traffic. According to the shop working on it, they have checked out all of the potential issues and have come up short. Any suggestions other than, get a new mechanic. Thanks