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www.cargurus.com > Questions > Ford > F-250 Super Duty
CarGurusDec 1, 2014 - 10 mph a very loud snap bang from under the cab (I think) now... ...Could probably hear it from 50 to 75 ... truck - no cut wires - i have no power to my 4 wheel drive button on the inside of my truck ? any ... Used Cars For Sale.
check for broken suspension components. Shouldn't be hard to find the culprit, if it is grinding it is making metal shavings and should be able to look for shiney metal parts.
This is a hard problem to describe, I know, and I will toss out a few possibilities. If the noise occurs when the car is accelerating, it can be motor mounts, or carriage mounts on front-wheel drive vehicles. Transmissions can bang into gear. Drive shaft u-joints can bang before they fail. C-V joints in front wheel or 4 wheel drive units can bang when worn out.
The exhaust system can break loose and bang on the frame. Brake calipers can rock in their mounts and transmit sound. Tie-rod ends can make a knocking noise on every bump you hit. There were recalls on gas tank straps for some Ford made units, so a loose gas tank can bang.
on driver side of t case pull actuater spra with pb blaster turn 4x4 off and on it will break loose then put it back if noyt turn shaft with chanel locks and buy a new one bout a100 bucks
Your issue would actually be with your transfer case I believe, do not tow in 4 wheel drive. A 5.4 super duty can pull a house on skids.... ask previous owner if rear differential has been swapped out as well. Just as an after thought, first make sure your camper brakes are not engaged...if it has brakes.
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