Frequently Asked Questions About International ProStar Drive Axle Springs & Hangers

What years and models of International ProStar are these drive axle springs and hangers compatible with?

Our drive axle springs and hangers are designed to fit International ProStar models from 2008 through 2017. However, compatibility can vary based on your specific truck configuration, including whether you have a single or tandem axle setup, and your suspension type (air ride or spring). We recommend checking your VIN or contacting our support team with your truck's specifications to ensure proper fitment before ordering.

What's the difference between OEM and aftermarket springs, and which should I choose?

OEM springs are manufactured to International's exact specifications and typically use premium steel alloys with factory coatings. Aftermarket options often provide comparable performance at a lower price point, with many featuring enhanced corrosion resistance through powder coating or e-coating. For trucks under warranty or requiring exact OEM specifications, stick with genuine International parts. For cost-effective replacements that meet or exceed OEM standards, quality aftermarket brands like Dayton Parts or Triangle Suspension Systems are excellent choices.

Can I replace springs and hangers myself, or do I need special tools?

While experienced mechanics can perform this replacement, it requires heavy-duty equipment including a proper truck lift or jack stands rated for commercial vehicles, spring compressors, torque wrenches capable of 450-500 ft-lbs, and safety equipment. The job typically takes 4-6 hours per axle and involves supporting the truck frame, safely removing tension from the old springs, and precisely torquing U-bolts to specification. Due to safety concerns and the need for proper alignment, many drivers prefer professional installation.

How do I know when my drive axle springs or hangers need replacement?

Common signs include visible cracks or breaks in spring leaves, excessive rust or corrosion on hangers, uneven tire wear on drive axles, sagging on one side of the truck, squeaking or groaning sounds during operation, and worn or elongated hanger bolt holes. During pre-trip inspections, look for leaves that have shifted or separated, and check that your truck sits level when unloaded. Any visible damage to springs or hangers should be addressed immediately to prevent failure.

What weight capacity springs do I need for my ProStar application?

Spring capacity depends on your truck's configuration and typical loads. Standard ProStar day cabs typically use 12,000-13,500 lb capacity springs per axle, while sleeper models may require 20,000-23,000 lb ratings for tandem setups. Check the stamped numbers on your existing springs or the specification plate on your driver's door jamb. When in doubt, provide your VIN or GVWR (Gross Vehicle Weight Rating) and GAWR (Gross Axle Weight Rating) to ensure you get springs rated for your specific hauling needs.