I unplugged the power cord to connect the truck and trailer and it still makes the same sound..... i have a trailer brake but without the cord being conected it shouldnt work right? the sound was coming from under the truck.
if it was coming from the truck, check driveshafts and ujoints for play, depending on size of the trailer, it might just have surge brakes, it autolocks itself when it starts slowing down to asst. the truck. you cant really turn those off, but when you start again it pops.
A forum community dedicated to Ford F-series owners and enthusiasts with a Power Stroke diesel engine. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more!