- Home
- Peterbilt Parts
- Peterbilt 357/378 Parts
- Peterbilt 357/378 Frame & Chassis
- Peterbilt 357/378 Steering Parts & Acc.
Peterbilt 357/378 Steering Parts & Acc.
Frequently Asked Questions About Peterbilt 357/378 Steering Parts & Acc.
What years do these steering parts fit, and are they compatible with both 357 and 378 models?
Most steering components in this category fit Peterbilt 357 and 378 models from 1987 through 2007. However, there are some variations between early and late production years. Pre-1995 models may require different steering shaft lengths and pitman arm configurations. Always verify your truck's exact year and VIN prefix when ordering steering boxes, columns, or linkage components to ensure proper fitment.
How difficult is it to replace a steering box, and what special tools are required?
Replacing a steering box typically takes 3-4 hours for experienced mechanics. You'll need a pitman arm puller, torque wrench capable of 185-250 ft-lbs, and potentially a steering wheel puller. The most challenging aspects are removing the old pitman arm (often seized) and properly aligning the new box. Many customers report needing penetrating oil and heat for stubborn pitman arms. Professional alignment is required after installation.
What's the difference between remanufactured and new steering boxes, and which should I choose?
Remanufactured steering boxes from reputable suppliers undergo complete rebuilds with new seals, bearings, and wear components, typically carrying 1-3 year warranties at 40-60% less cost than new units. New OEM boxes offer 3-5 year warranties but cost significantly more. For trucks with over 500,000 miles, remanufactured units provide excellent value. Choose new boxes for low-mileage trucks or critical applications where maximum longevity is essential.
Why is my steering wheel off-center after installing new tie rod ends or drag links?
This is a common issue that occurs when components aren't installed at the same thread depth as the originals. Count the exposed threads on your old parts before removal and match them on the new components. Even small variations can shift your steering wheel position by several degrees. Professional alignment is always recommended after replacing any steering linkage components to ensure proper toe settings and centered steering wheel.
What are the warning signs that my steering shaft or u-joints need replacement?
Common indicators include clunking noises when turning, excessive play in the steering wheel (more than 2 inches), vibration through the steering column, or visible wear at the u-joint connections. Telescoping shaft issues often manifest as binding during turns or difficulty maintaining steering wheel position. These components typically last 300,000-500,000 miles but require replacement sooner in severe-duty applications or if regularly exposed to road salt.