It is a 1500 and like Bad340fish said it stops doing it as soon as I puss the throttle any and when I turn on TOW hauling. I will be towing a 3000 lb race car on open trailer.

1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...