Check the listing for details. Meritor Slack Adjuster P/N R802381. Condition: New other (see details). Listed at 45.00 USD. The Meritor Slack Adjuster P/N R802381 is a high-quality commercial truck part manufactured by Arvin Meritor. This essential component is designed to ensure optimal brake performance and adjustability on commercial vehicles. With the trusted Arvin Meritor brand behind it, you can depend on this slack adjuster to provide reliable and efficient braking solutions for your trucking needs.