What the hell is this sound?

I know this has probably been answered but when I come to a stop there is a weird thump noise about 2 seconds after I stop. Kinda sounds like i have a loose 25lb weight sliding from the back of my bed to the cab. It is very noticeable and annoying. Could this have anything to do with the drive shaft. I drive an 06 reg cab. The truck has 54k miles on it. I bought an extended warranty up to 103k miles so I should be able to have what ever it is repaired. Any help would be greatly appreciated. Other than that I love the truck.

 

Axle wrap.

 

Put an AAL in and it should hepl rectify the problem.

 

I have the same prob. Its a pain in stop and go traffic. So AAL is the answer?

 

Or a traction bar. You choose. AAL $ Trac bar $$$$$

 

You should probably also check U-joints. Just in case.

 

Here we go, wait for it, wait for it.... whats AAL? sorry fellas
I have no damn clue.

 

Add A Leaf

 

you have a set of leaf springs on each side in the rear. Add a leaf spring to each set. downsouth motor sports has them for pretty cheap.

 

will do thankyou very much guys. would my warranty cover this if I took it in. It says drivetrain, wouldnt that be included.

 

I have the same noise in my truck, seems to do it most in stop and go traffic. Ive already installed add a leafs though.

 

well if you have already done that, and it still makes that sound then now what. Is there a TSB for this that I can take to the dealership. want it gone.

 

If my gas tank is about 3/4 full and come to a normal or slightly hard stop, I hear the thump. My guess it is fuel slooshing around and slapping the front of the tank. Of course I am known to be wrong too.

 

If you still have the sound after the AAL then the traction bar or a new leaf pack is next. I have it too, but I know it isn't gonna hurt anything. Or you could even get a one piece drive shaft. It doesn't bother me enough to spend money on a sound. nothing is broken and it doesn't need to be fixed.

 

x2

Most trucks do this, it's the penalty for having a lot of fuel onboard... keep track of it as you go through a tank, if it comes and goes that's probably what it is.

 

My truck makes the same noise and I am fairly sure its the fuel sloshing around in the tank.

 

Interesting point. I have noticed its not every time I stop. I have half a tank I'll check it out tomorrow. Whatever it is.... until I see sparks im not stoppin.

 

Mine does this sometimes too. I thought it was gas sloshing.

 

X2 thats what i was thinking cause it doesn't happen all the time, esp when the tank is super full or super empty. i drive in stop and go traffic the majority of the time and it only happens when there is extra space in the tank.

i encounter axle wrap at times but that's cause when i lowered my rear i killed the rear struts...

so this is not axle wrap if the OP has the same problem i do

 

reg cabs have a once piece driveshaft stock