Frequently Asked Questions About Kenworth W900A Dash Knobs

Will these dash knobs fit my specific year W900A model?

Our Kenworth W900A dash knobs are designed to fit most W900A models from 1961 through 1990. The thread size is typically 1/4"-20 or 5/16"-18, which matches original factory specifications. However, some mid-80s models may have variations, so we recommend checking your existing knob thread size before ordering. If you're unsure, contact our support team with your VIN and we'll help verify compatibility.

What's the difference between chrome plastic and billet aluminum knobs?

Chrome plastic knobs are lightweight, cost-effective, and maintain their shine without polishing. They work well for most applications but may crack under extreme temperature changes. Billet aluminum knobs are machined from solid aluminum, offering superior durability and a premium feel. They're heavier, which some drivers prefer, and can withstand harsh conditions better. Aluminum knobs do require occasional polishing to maintain their luster, especially if you choose a polished finish over anodized.

How difficult is it to install these dash knobs myself?

Installation is straightforward and typically takes 5-10 minutes per knob. Simply unscrew the old knob by turning counterclockwise (some may require gentle wiggling if stuck), then thread the new knob clockwise until snug. Don't overtighten as this can strip threads or crack plastic knobs. For stubborn removals, a rubber strap wrench helps prevent damage. No special tools are required, though having a thread gauge can help identify your thread size if replacing only some knobs.

Do you offer matching sets for all the dash controls?

Yes, we stock complete matching sets that include knobs for heater controls, wiper switches, light switches, and auxiliary switches. Sets are available in chrome, black, polished aluminum, and custom colors. Buying a complete set ensures uniform appearance and often costs less than purchasing individually. We also offer period-correct styles for restoration projects and modern designs for custom builds.

How do I clean and maintain these dash knobs to prevent fading or wear?

For chrome plastic knobs, use mild soap and water with a soft cloth. Avoid harsh chemicals that can cause clouding. For aluminum knobs, use aluminum polish quarterly to maintain shine, or choose anodized finishes that require only soap and water cleaning. All knobs benefit from UV protectant spray if your truck sits in direct sunlight. Avoid using abrasive cleaners or steel wool on any finish, as these will cause permanent scratching.