Just received letter from Toyota regarding issue regarding "shudder" during torque converter flex lock up. Toyota is offering warranty coverage beyond the primary coverage which goes until 12/31/18 on my 2013 Rav4 until 8 years from date of first use or 150,000 miles whichever comes first. I haven't had this shudder issue. Has anyone else? The repair described is a new torque converter, additional transmission pan magnets and updated engine control software.