Reduce Cabin Noise

DO NOT USE EXPANDABLE FOAM!
THIS WILL ONLY MAKE YOUR SCOUT RUST!

Now that that's clear lets begin. 

Standard Squeak and Rattle Checks

A quick tip before starting the process: Don't try to fix everything at once, you'll get overwhelmed and you'll give up. Instead, pick a single noise, isolate it and fix or reduce it, then move on to the next one.

• Check for exhaust leaks (droning or unnecessary exhaust noise).
• Check tire wear for misaligned or unbalanced tires (vibration or low humming).
• Check for loose bolts and screws (rattles and squeaks).
• Check rear lift gate hinges. These hinges are often ripping out and allow the lift gate to shimmy back and forth creating unbearable clatter. Also, if your lower liftgate seal is worn or missing this will also allow the liftgate to shake. 
• Check rear lift gate latch. Latch fork connection tubes can work loose and open up over time.
• Check seals. Everything from the windshield cowl, to the hardtop, the door, and lift gate/tail gate (wind noise whistling).
• Check door and window alignment / gaps (wind noise whistling).
• Check door and window felts and tracks (rattles and squeaks).
• Grease the spring bushings (squeaks over bumps).
• Grease all hinges and other points of rotation or movement (squeaks).
• Check body mount bushings. Your trucks bushings isolate metal on metal vibrations between the cab and the frame.