When I stop moderately hard, my bed makes a squeaky noise and sounds like its rocking back and forth. What could be causing this? Any help is appreciated.

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99 F150 ext cab, XLT, 4.2L V6, short bed, K&N filter,

 

As a matter of fact, I just saw a tsb on Oasis for this today. If it's what I think it may be, it's your gas tank straps. I believe it said to loosen them and make sure they are properly installed and tighten them properly. Hope this helps. It also said you should be able to rock the truck bed and hear this.

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1997 F-150, 4.6, automatic, Dark Toreador Red, Supercab, Flareside, 4X4 Off-Road, Towing Package, Ford hvy dty rubber floor mats, Kenwood 10-disk cd changer, Kenwood am/fm cassette head unit, Ford bugshield, Chrome Grizzly Wrap Around Push Bar with 2 KC 100w Daylighters, Ventshades, Ford bedliner, Lund Premier tonneau cover, cab and bed professionally undercoated, Code Alarm Sure Start RVS remote starter, Ford alarm, Realistic CB with Wilson Little Wil antenna and Astatic power mic, ported MAF sensor, and Lots of TLC!! (Besides being an F-150 nut, I am a Ford auto technician.)

 

Mine makes noises whether she's strapped down to the bed correctly or not. I guess it's just her nature.

 

Sycoholic,
Can you tell us what the TSB number is? Alldata.com is never updated, I cannot find the recent TSBs.. thanks!!

 

I finally got under the truck today to take a look at it. Turns out that discount tire didn't tighten my spare very well when they fixed my flat. I tightened it up and she's back to normal