Frequently Asked Questions About Peterbilt 352 Dash Knobs
Will these dash knobs fit my specific year Peterbilt 352?
Our Peterbilt 352 dash knobs are designed to fit models from 1969 through 1987. These knobs use the standard 1/4"-20 thread pattern found on most 352 controls. However, some late 1986-1987 models may have different thread sizes on certain controls. We recommend checking your existing knob threads before ordering, or contact our customer service team with your OEM for verification.
What's the difference between chrome plastic and billet aluminum dash knobs?
Chrome plastic knobs are lightweight, cost-effective, and provide a classic chrome appearance that matches factory styling. They typically last 3-5 years with regular use. Billet aluminum knobs are machined from solid aluminum, offering superior durability and a premium feel. They're heavier, resist cracking and fading better, and can last the lifetime of your truck. Billet options cost more but are ideal for show trucks or drivers wanting long-term reliability.
How do I remove stuck or seized dash knobs without damaging my dashboard?
First, spray penetrating oil where the knob meets the shaft and let it sit for 10-15 minutes. Grip the knob firmly with padded pliers or wrap it with a rubber strap wrench to avoid scratching. Turn counterclockwise while pulling gently. For extremely stuck knobs, apply heat with a hair dryer for 30 seconds to expand the plastic slightly. Never use excessive force as this can damage the control shaft or dashboard panel.
Can I mix different styles of dash knobs, or should they all match?
While matching sets create a uniform, professional appearance, mixing styles is perfectly acceptable and often done for functional reasons. Many drivers prefer larger knobs for frequently used controls like the throttle or jake brake, while using standard sizes for less critical switches. Popular combinations include diamond-cut knobs for primary controls and smooth knobs for auxiliary switches. The key is maintaining the same finish (chrome, black, or colored) across all visible knobs.
My new dash knobs feel loose even when fully tightened. How do I fix this?
Loose knobs typically indicate worn threads on either the knob or control shaft. First, check if the set screw is fully tightened - it should be snug but not overtightened. If still loose, wrap the shaft threads with one or two layers of Teflon tape before installing the knob. For knobs without set screws, a small drop of blue thread locker can secure them while still allowing future removal. If the control shaft threads are stripped, you may need to replace the entire switch assembly.
