Warped brake rotors.
If it is while you are braking, the rotors or druma are warped.
Your Brake rotors are warped... Remove them and have them turned or replace them.
There are several problems that could cause your car to jerk when slowing down. The most common cause would be a transmission problem.
Letting go of the pedal or pushing the gas pedal.
This would indicate negative acceleration, which would mean that the object in question is speeding up.
A bad rotor would not necessarily cause a bad vibration as it would most likely create a noise and wear your break pads down unevenly. It could be as simple as an unbalanced tire or a warped rim. Also if your tires are choppy then a vibration can become noticeable. Also a bad bearing or axle could cause vibration (however, it would be noticeable at a lower speed).
vehicle is still in gear, step on clutch
slowing down.
ja
its when something is slowing down
True
Gradually slowing down is 'decelerating'.