I purchased my 2006 Lincoln Zephyr approximately June 2009 at Carmax in Laurel, MD. I can not recall the exact mileage but the vehicle ran fine up until January 2010 when I noticed the transmission slipping and the car would'nt accelerate past about 25mph. This happened numerous times while I was driving on the highway. I took my vehicle on February 12, 2010 to Shell get a transmission flush done which cost about $350. Needless to say the car is again having the same issues with the transmission slipping and it is only October 2010. I... read full review »