Ridgewood

My spouse and I both had ES330, the transmission hang was so bad that after a nightmare, Lexus replaced my spouse's 2005 with a 2007 model. The Lexus service folks admitted that there is a major issue with the transmission in the 2004, 2005, 2006 models and they had finally gotten it right in the worked it out in the 2007 model. My husband's 2007 drives fantastic. Currently I'm in mediation with Lexus regarding this issue. They have offered to get me into a 2007 model for a mere $7500. Since I don't want to pay Lexus $7500 to replace my 2005 ES330 lease car, I could use some suggestions on the best route to solve the problem. They stated that the dealer tried to put an upgrade computer program on my car but the car already had the upgrade so their service department said the car was driving as designed. When I told the mediation folks that Lexus had already stated it was a faulty transmission, they made no comment. They have given me until June 18th to accept their offer, quoting me the Texas Lemon Law protects Lexus, does anyone have suggestions? I'm a certified mediator and confident that I could do well in the hearing but would like to hear others comments. Thank you