4.7L V8 SMPI DOHC, 5-Speed Automatic with Overdrive, and 4WD. What a price for an 06! What are you waiting for?! If you've been hunting for just the right 2006 Lexus GX, well stop your search right here. This is the family SUV that fits the needs of you and your loved ones. Climb into this fantastic GX and enjoy the array of features and options that are certain to impress. J.D. Power named the2006 GX as the highest ranked in Overall Initial Quality Mechanical in its class.