Frequently Asked Questions About International RH Drive Axle Springs & Hangers

What International truck models are these RH drive axle springs and hangers compatible with?

These springs and hangers are designed for International ProStar, LoneStar, 9900i, and 9200i models typically from 2008 onwards. They fit trucks with Hendrickson air ride suspensions on the right-hand (passenger side) drive axle. Always verify your specific truck's VIN and suspension type before ordering, as International used various suspension configurations across model years.

How difficult is the installation process, and what tools are required?

Installation typically takes 3-4 hours per side with proper equipment. You'll need a heavy-duty jack or lift capable of supporting the axle weight, impact wrenches, torque wrenches (specs range from 150-450 ft-lbs depending on fasteners), and spring compressors for leaf spring models. Many customers recommend having a second person assist due to component weight. Professional installation is advised if you lack experience with heavy-duty suspension work.

What's the difference between OEM and aftermarket springs, and how does it affect ride quality?

OEM springs maintain factory ride height and load ratings, while aftermarket options may offer different spring rates. Heavy-duty aftermarket springs typically have 10-15% higher load capacity but can create a stiffer ride when running empty. Standard aftermarket springs generally match OEM specifications closely. For trucks frequently hauling maximum loads, heavy-duty springs reduce sagging, while standard springs work best for mixed-use applications.

How can I tell if my springs or hangers need replacement?

Common signs include visible cracks in spring leaves, worn or elongated hanger bolt holes, uneven ride height between left and right sides (more than 1 inch difference), excessive squeaking during suspension movement, and broken or missing spring clips. Hangers showing rust perforation or bent mounting brackets should be replaced immediately. Regular inspection during oil changes helps catch issues early.

Are polyurethane or rubber bushings better for the hangers?

Polyurethane bushings last 2-3 times longer than rubber and maintain consistent performance in extreme temperatures, making them ideal for high-mileage applications. However, they transmit more road vibration to the cab. Rubber bushings provide a quieter, smoother ride but typically need replacement every 150,000-200,000 miles. Most long-haul drivers prefer polyurethane for durability, while local delivery drivers often choose rubber for comfort.