READ DIFFERENTIAL HAS FAILED. YEARS AFFECTED ARE 2007-2009. IN 2010 TOYOTA ISSUED AN UPDATED STRONGER VERSION OF THE DIFFERENTIAL. WHEN DIFFERENTIAL FAILS IT CAN LOCK UP BOTH WHEELS AT HIGH SPEEDS THUS LOSING CONTROL. THERE ARE OVER 2000 COMPLAINTS ONLINE AND OVER 10000 COMPLAINTS WITH TOYOTA ALONE. IT IS NOT ONLY COSTLY IT IS VERY DANGEROUS. MINE BROKE AT 40 MPH AND I ENDED UP IN A DITCH. WHAT IF I HAD BEEN DOING 60 OR 70