Frequently Asked Questions About Mack RD Truck Windshield Accessories

Will these windshield accessories fit my specific Mack RD model year?

Most windshield accessories for Mack RD trucks are designed to fit models from 1990-2004, including RD688, RD690, RD600, and RD800 series. However, minor variations exist between early models (1990-1999) and later models (2000-2004), particularly in mounting hole patterns and windshield frame dimensions. Always verify your truck's exact year and model number before ordering, as some accessories may require specific mounting brackets for certain year ranges.

Are the sun visors and bug deflectors made from durable materials that can withstand highway conditions?

Quality windshield accessories typically feature either 304 stainless steel construction or heavy-duty ABS plastic with UV inhibitors. Stainless steel visors offer superior longevity and resist rust, while maintaining their finish through years of weather exposure. ABS plastic deflectors should be at least 3/16" thick to prevent cracking from road debris and temperature extremes. Look for products with reinforced mounting points and weather-resistant hardware to ensure they stay secure at highway speeds.

How difficult is the installation process, and what tools will I need?

Installation typically takes 1-2 hours and requires basic hand tools including a drill with metal bits, socket set, and screwdrivers. Most sun visors mount using existing cab holes or require drilling 4-6 new holes using provided templates. Bug deflectors often use no-drill clamp systems that attach to the hood edge. Critical installation tips include using rust-preventive coating on any drilled holes, applying thread locker to mounting bolts, and ensuring proper alignment before final tightening to prevent wind noise.

What styles and finishes are available, and how do they affect visibility?

Common options include straight visors (5"-9" drop), curved visors, and combination visor/light bars. Finishes range from polished stainless, chrome-plated steel, to color-matched painted options. Tinted acrylic wind deflectors come in smoke, dark smoke, or clear. When selecting visor height, consider that drops over 7" may slightly reduce forward visibility for shorter drivers, while drops under 5" provide minimal sun blocking. Side window deflectors should extend 2"-3" from the cab for optimal rain deflection without creating blind spots.

Do these accessories actually improve fuel economy or are they just for appearance?

Properly designed bug deflectors can redirect airflow over the windshield, reducing bug splatter and potentially improving aerodynamics by 1-2% in fuel efficiency at highway speeds. Sun visors primarily serve functional purposes by reducing glare and cab temperature, though aerodynamic benefits are minimal. Wind deflectors for side windows reduce cabin turbulence and noise when windows are cracked open. While aesthetic appeal is important, these accessories do provide measurable functional benefits when correctly installed and maintained.