When the windows are down in my 91 RS and I'm cruisin' over a little bumpy road, I hear a loud banging noise almost sounding like the pasenger door isn't shut all the way or something. What gives?????

 

Check the ajustment guides in the door...

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90 Firebird SSA (Bone stock 3.1)

Everything Below I've added

Engine: Accel Super Coil, 8mm Accel Ignition Wires, 170 Degree Thermostat, NKG Plautum Plugs, K&N Filter, Flowmaster 80

Suspension: Bell Tech Drop Spindles, Edelbrock PanHard Bar, Lakewood Lower Control Arms, Wonderbar IROC-Z, KYB GR2 Struts, KYB Gas-a-Just Shocks, PST Suspension Polygrapite Bushings All Round, 36mm WS6 Front Sway Bar, 24mm WS6 Rear Sway Bar

Brakes: Cross Drilled and sloted Rotors

Appearance: Trans Am Tail Lights, Trans Am Wrap Around Wing, Trans Am 16" Alum rims, Tinted Windows Rear 90% Sides 50%

Interior: GTA power seats, Overhead console, Power windows, Power locks, T-tops, Sun shade, Pioneer P77DH, Uniden radar detector, Intellitronix - Fuel pressure gauge, Transmission temp gauge. (In pods)

 

On both doors, there are two metal tabs, with felt thingys on them that hold the window steady. In my car, one is off on each side, and my windows rattle like crazy. Just a thought.

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'82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come...
http://www.spinfrenzy.com/stingerssx...easures.html#4