Knocking noise in the rear when going over big bumps

[Hans Moleman]

I have the tailgate step. Could it be the tailgate step assembly be causing the noise?

Or could it be the leaf springs?

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[Maplestaple]

My clunk was leaf springs. I retorqued the U bolts and added extra rubber insulators and not a peep since. I haven't heard the step make any noise ever. Search for leaf spring clunk.

 

[HammaMan]

I have the tailgate step. Could it be the tailgate step assembly be causing the noise?

Or could it be the leaf springs?

Yes, situations do present where you can hear the step clanking around. A loose spare could also be another point, but not likely. Worth checking though. The tailgate step for-sure is a noise source.

 

[jhelrey]

I removed the spring out of my tailgate step so it would sit flush and I don't hear it bounce. Must be something else.

 

[Hans Moleman]

I think it might have been loose bed bolts?

I had Rhino liner sprayed on. The shop removed the bed bolts to spray the bed liner on. After I got it back there is no more knocking noise.

 

[Kanuck]

I think it might have been loose bed bolts?

I had Rhino liner sprayed on. The shop removed the bed bolts to spray the bed liner on. After I got it back there is no more knocking noise.

I have never heard of a shop doing that. They would just spray over the bolts.

I hope the shop replaced those bolts. They are a one time use only. The bolt stretches when torqued to the correct ft/lbs. It is in the Ford manual on removing and reinstalling the truck box.

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