i just noticed the same thing and it surpasses all other annoying stuff.. if i post a vid of me rocking and recreating the sound would someone be able to give me an educated guess/hint where i may need to look.. i always find answers via search.. this one is making me want to .. well never mind.. as a pastor i cant post that..LOL

thanks for the vast history of knowledge that helped this noob out so much i paid the membership the first day i signed up..

 

Yeah, post it up and let's take a look.

 

There is quite a bit of frame flex on the 1/2 ton trucks of this vintage, I have seen plenty of video and pics of these trucks in offroad terrain that show the bed moving several inches out of alignment with the cab. The bed on my truck also moves around quite a bit and I know it's bolted on the frame properly and not rotted.

 

Not just 1/2 ton... my 250 flexed just as much as my 150 does. Frames were about the same length overall...
F-150 = SuperCab shortbed
F-250 = Reg. cab longbed

Better it flexes than be stiff, brittle and fixin' to snap

 

^^ this, and the bedsides. My former 93 had really flexy bedsides due to rot, and it caused the tailgate to squeak.

 

When I did the bed swap on my 89 F250, I found thin black plastic washers on top of the frame rails where the bed is mounted. Two of the four I had were bad and I didn't put them in. I now have squeeks when frame and bed is flexed. May be one or more have wore out and are cause of the noise.

As a unattended fix that happened to me (junk cheby engine leaked oil in the bed). Try spraying some WD40 or equ where the bed and frame mounts. That took care of me squeeking noise till the oil dried up.

 

ill get on the video this weekend..

i have joined the board here BTW.. thanks

 

any solution for problem