Ok a simple fix m1078.

[Xengineguy]

Working on my second truck. The cab noise when hitting small bumps was bad! Squeaks, thumps
very annoying noises. I have already installed new mounts and replaced the rubber disc at the cab latch.
So I decided to try lubricating the hooks and pins on rear cab mount. A finger full of grease on each side
and the difference was amazing! I lubed the pins and hooks (also the hooks on the inside)
Anyway a cheap and easy fix that delivers great results.

 

[Third From Texas]

Yep, did that exact thing (finger of grease to the hooks) every time I fueled up my old A0 truck.

Cab was nice a quiet.

Non-issue for the ridged-mounted A1R cab that lacks the hook/tab configuration.