general problems of the 1998 Infiniti QX4

When you let off the gas peddle the rearend starts a violently shakeing back and forth and will cause you to drive over something or someone due to defective bushings!!!how can they sell us crap that can cost the lives of so many people and not honor a recall on rear bushings. . . I nearly shut down the interstate on my last drive. . . . . .

I recently bought this car today and it was driving fine at low speeds, but until I accelerated over 40mph the rear back was swerving left to right after I release my foot off the gas. Almost had 4 crashes. Something in the rear is making the car swerve like its losing traction but only when it's released off the gas pedal. It was the biggest fatal part of experience within driving of my life. All I know is that it is pretty rusted on the strut areas since I checked if something was broken under the car. Low speeds around 30mph the car drives fine but higher speed its like, I have to keep accelerating to prevent the car from swerving in the rear. My life was endangered for 40 minutes of my life on the highway. Please contact me, this is a very dangerous situation I need to repair.