Peterbilt 330/335/337 Mirrors & Acc.

Frequently Asked Questions About Peterbilt 330/335/337 Mirrors & Acc.

Will these mirrors fit my specific year model Peterbilt 330, 335, or 337?

Most aftermarket mirrors for Peterbilt 330/335/337 models are designed to fit trucks from 2005 to current production years. However, there were minor mounting bracket changes in 2008 and 2014 model years. Always verify the specific part number matches your truck's OEM and year. For 2005-2007 models, you may need adapter brackets for certain mirror styles. We recommend calling our technical support team with your OEM to ensure proper fitment before ordering.

What's the difference between manual and electric mirrors, and can I upgrade from manual to electric?

Manual mirrors require physical adjustment from outside the cab, while electric mirrors feature motors controlled from inside. Upgrading from manual to electric mirrors is possible but requires running new wiring harnesses from the door panels to the dash switch panel. Most electric mirror kits include the necessary wiring, switches, and installation instructions. The upgrade typically takes 2-3 hours per side for experienced installers. Consider that electric mirrors also require a working electrical system and may need relay installation for proper operation.

Are chrome mirrors worth the extra cost over black plastic, and how do I maintain them?

Chrome mirrors typically cost 40-60% more than black plastic but offer superior durability and appearance retention. Chrome-plated steel mirrors resist UV fading and maintain their finish for 5-7 years with proper care, while black plastic mirrors may fade or chalk within 2-3 years. For maintenance, use non-abrasive chrome polish monthly and avoid harsh chemicals. Chrome mirrors also tend to have better vibration resistance due to their heavier construction, reducing mirror shake at highway speeds.

What tools do I need to install replacement mirrors, and what are common installation issues?

Basic installation requires a socket set (typically 13mm, 15mm, and 18mm), Phillips and flathead screwdrivers, and potentially a drill with metal bits for new mounting holes. Common issues include stripped mounting bolts (use penetrating oil 24 hours before removal), misaligned brackets (some grinding or shimming may be needed), and door panel removal for electric mirror wiring. West Coast style mirrors often require longer arm brackets than stock mirrors. Allow 45-90 minutes per mirror for installation.

Do aftermarket mirrors vibrate more than OEM mirrors, and how can I reduce mirror shake?

Mirror vibration depends more on mounting quality and mirror construction than OEM versus aftermarket status. Look for mirrors with dual-ball swivel mounts and reinforced brackets, which reduce vibration significantly. If experiencing shake, check that all mounting bolts are torqued to 25-30 ft-lbs, add rubber isolation washers between the bracket and door, and ensure the mirror head adjustment is properly tightened. Convex mirrors tend to vibrate less than flat glass due to their smaller surface area and aerodynamic shape.