Peace I have a 04 lariat f150. Problem is every time I stop at a light or stop sign I hear and feel a bump. Coming from the rear I guess . Had my truck aligned asked the alignment person about the situation he said ford just do that. True or false I need help.

 

Try strapping down the stuff in the bed. Lol



These trucks don't just " do that" I'm not sure what it is, but try giving more info to help us help you

 

Slip yoke??