Ford 2000 F250-SD Supercab Long Bed – Mileage 115,000
I’m having a strange noise when cross over railroad tracks or other similar road surfaces...the noise is coming for the rear wheels (not really sure about which side). It sounds like some sort of wheel hop. I’ve replaced the rear shocks (twice) and check the rear suspension for anything that was loose…PLEASE HELP !!!!!!

 

Mine does the same thing...

 

did you check your leaf springs?

these things have braces installed on the leafs for transit. The dealer is supposed to remove them during delivery prep. They usually just stay there but at some point work loose and jangle about.