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About Fleetrite Slack Adjusters

FleetriteĀ® slack adjusters from Navistar are premium-quality products designed to replace common industry models. All slack adjusters exceed SAE 1462 specifications, and are made of high-quality ductile iron and heavy-duty steel alloy worm gear. Slack adjusters are Navistar aftermarket quality approved, and are backed by a one-year parts and labor warranty.


One-year parts and labor when installed at an International Dealer

  • High-quality ductile iron body
  • Heavy-duty steel alloy worm gear
  • Long-lasting NBR seals

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