My suv with 215,000 miles sometimes starts to wobble on the back end when I am trying to accelerate. I just had rotors, calipers replaced as well as a tune up. Noticed decreased power thus the need for the tune up. The wobble was also present before tune up. Suv acceleration has been better since tune up but i have noticed that when I accelerate quickly and stop a few times that truck starts to drag again and wobble. It does this for a while then goes back to normal. Also, I can always tell when it is going to happen because the brake gets harder than usually and the steering wheel stiffens up. All ideas are appreciated. This is really concerning. Thanks in advance. BTW engine light is on but it has been for the pass five years.