i just found out i have the sports addition it has a 4.0 liter v6 and a 4 speed auto. i really need a cruise control because it is difficult for me to judge speed and i haven't gotten a speeding ticket in years. my truck just runs to smooth to tell how fast i am going until i look at the speedometer and notice i am doing 80 in a 60 zone oops(hehe) the wifes asleep. it is a fun truck to drive but the steering is a bit stiff,probably that sports package. and it corners real nice no sway,no lean,no slip,nice.