brakes on 1990 Chevrolet S10

Every time i put on the brakes the brakes shake as if the brakes are not completely angaging.after i let go of the brakes the brakes are still shaking as if the brakes are still engaged.Please respond with an answer.Thank you, jrrs

Asked by for the 1990 Chevrolet S10
Normally when there is a shudder under braking, it's because the front rotors are warped and either need to be replaced or resurfaced.
I found the problem and it was seized driveshaft u joint.
1 more answer
Take your rotors and drums off and have them turned at your local parts store, replace rear brake shoes and front brake pads.