Hey Guys Newbie Here, I Have A 1997 F250 5.8 Auto, Over 8600 gvw, My Problem , I Have Replaced Every Thing To Do With Brakes On This Truck, Rotors Loaded Calipers , Lines , Etc , I Even Replaced The U Bolts And Front Rear Spring Bushings, My Problem , If I Ease Into My Brakes With A Light Foot I Have No Issues At All, If I Get A Heavy Foot I Get A Severe Body Shake ?? Not Death Wobble, Just A Body Shake, I Am A Mechanic By Trade But Have Been Away From This For A While, I Have Done All The Work Myself , Any Ideas Would Helpful, I Really Hate To Get Rid Of This Truck, I Use To Plow Snow ,Pull My Trailer, Go To The Dump, Haul Pellets, ETC,, I Have Done The E Brake Thing , You Know Holding Up The Release Lever And Pushing Down On The E Brake When Moving , Just Slows Down No Shake , What Did I Miss ???? I Have Run Fords Most Of My Life, I Have 3 At This Time, 2014 Stx , Work Truck, 2014 Xlt Pleasure Truck, And My Fav , 1997 F 250 HD,, Help, Please I Really Don't Want To Part With My Old Friend,,,,,,,,, Springs Are Good , Ball Joints Are Fine, Steering Is Tight, Truck Has 120.000 Miles Runs New , You Can Drive Down The Highway At 65 No Shakes No Wobbles , Until You Get Heavy On The Brakes , When You Let Up The Shake Stops,,,, Ideas?? Thanks David In Vermont

 

Start looking for loose hubs. Under light breaking you won't notice it. Under heavy breaking effort the hubs can chatter on the bearings. Is this 4x4 or 2wd?