Our comprehensive product line of Peterbilt 379 steer axle springs and hanger parts are designed to improve load handling, ride quality, and correspond with various aftermarket configurations so that you can fine-tune the performance of your truck model.
Grab axle cup adapters, front spring spacers, load cushions, and axle shocks for a smooth ride. Or repair busted plates and leaves with individual wrapper leaves and repair plates in a variety of lengths and arches.
Full Leaf Spring Assemblies for the 379 Model
Repair your big rig with complete spring packs ranging from heavy duty rear springs (10,400 lbs. capacity) to front steer axle springs (6,570 lbs. capacity) and specialty BESTfit springs for flex air suspensions or Hendrickson setups.
Peterbilt 379 Front Spring Hanger Kits & Mounting Brackets
Find parts to keep your suspension and drivetrain securely attached and positioned, like carrier bearing kits, and durable aluminum hangers that reduce overall chassis weight.
Bushings, Bearings & Service Kits
Regain steer axle alignment with new polyurethane bushings, bearings, and service kits.
Find bushing assemblies to help fix steering misalignment, including end beam bushings for Hendrickson 340-520 series and poly silent block bushings.
Service Kits like beam end kits and king pin kits restore damaged pivot joints.
4 State Trucks stocks every component you need to regain precise steering control over your classic Peterbilt 379 model.
FAQs - Peterbilt 379 Steer Axle Spring Hangers
1. What do steer axle spring hangers do?
They connect the front leaf springs to your truck's frame and help hold your steer axle in place. Basically, they're key to your suspension staying stable and aligned.
2. How do I know if my spring hangers are bad?
Look for cracked hangers, worn bushings, or misaligned front suspension. If your steering feels loose or uneven, it's time to check your hangers.
3. Are these hangers a direct fit for the Peterbilt 379?
Yep. These are made to match OEM specs for the 379. Just double-check your year and suspension setup before ordering.
4. Do I need new hardware or bushings with a hanger replacement?
It's a good idea. If your hanger's worn out, the bolts, pins, or bushings likely are too. Grab a full kit if possible for a proper fix.
5. Can I install spring hangers myself?
If youâve got suspension experience and the right tools, yes. But it's a heavy-duty job that might need frame support and a press, so many guys take it to a shop.
6. Are these hangers sold individually or in pairs?
Most are sold individually, but we also offer kit options. Always check the listing to be sure.
7. Do these work with aftermarket leaf springs?
They can, as long as the spring dimensions match OEM. Always double-check the hanger's bolt pattern and spring eye size.
8. What suspension types are these compatible with?
Most work with standard leaf spring setups on the 379, but not all will fit custom suspensions or lowered trucks. Match it to your setup before you buy.
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