Frequently Asked Questions About Kenworth W900A Mirrors & Acc.

Will these mirrors fit my specific year W900A, and what about W900B or W900L models?

Most aftermarket mirrors for the W900A are designed to fit model years 1961-1990. The W900A has different mounting brackets and door configurations compared to the W900B (1987-present) and W900L (longer hood version). While some universal mirrors may work across models with modifications, we recommend checking the product description for your specific year or contacting us with your VIN to ensure proper fitment. The mounting hole patterns and arm lengths often differ between these models.

What's the difference between stainless steel and chrome mirrors, and which holds up better?

Stainless steel mirrors are made from solid stainless material that won't rust, peel, or pit over time, making them ideal for harsh weather conditions and coastal areas. Chrome mirrors feature a chrome plating over steel or plastic, offering a brilliant shine at a lower price point but may eventually show wear, especially around mounting points and edges. For long-term durability and minimal maintenance, stainless steel is superior, though quality chrome mirrors with proper care can last many years. Consider your climate and maintenance preferences when choosing.

Do I need special tools or drilling to install these mirrors, and can I do it myself?

Most replacement mirrors for the W900A use existing mounting holes and can be installed with basic hand tools - typically a socket set, screwdrivers, and possibly a drill for wire routing if adding heated or motorized options. Installation usually takes 30-60 minutes per side. The main challenges include routing wiring through the door (for powered mirrors), ensuring proper alignment for visibility, and tightening mounting bolts in tight spaces. No welding or major modifications are typically required, though some universal mirrors may need adapter brackets.

What mirror styles are available, and which provides the best visibility?

Common styles include the classic West Coast (large rectangular), aerodynamic hood-mounted, and combination mirrors with integrated convex spots. West Coast mirrors offer the largest viewing area but create more wind resistance. Hood-mounted mirrors reduce blind spots but may vibrate more. For optimal visibility, many drivers prefer West Coast mirrors with convex spot mirrors or integrated convex sections. Consider adding blind spot mirrors if your main mirrors don't include them - the W900A's long hood creates significant blind spots that proper mirror configuration can minimize.

Why do some mirrors vibrate excessively, and how can I fix this?

Mirror vibration is commonly caused by worn mounting brackets, loose bolts, or lightweight mirror construction. The W900A's long hood can amplify vibrations, especially with extended arm mirrors. To reduce vibration, ensure all mounting bolts are properly torqued, use lock washers or thread locker, and check that rubber isolators aren't compressed or missing. Heavy-duty cast aluminum or stainless steel mirror heads typically vibrate less than lightweight chrome-plated plastic. If vibration persists, consider upgrading to mirrors with thicker mounting arms or adding stabilizer brackets.