Frequently Asked Questions About Kenworth T800 Torque Rods & U-Bolts

What size U-bolts do I need for my Kenworth T800, and how do I measure them correctly?

U-bolt sizing depends on your specific axle configuration and suspension type. For most T800 models, rear suspension U-bolts typically range from 3/4" to 7/8" diameter with varying lengths from 14" to 18". To measure correctly, determine the diameter of your axle tube, measure the inside width between the legs, and check the thread length needed. Always verify against your truck's VIN-specific parts manual or contact us with your truck details for exact specifications.

Are aftermarket torque rods as durable as OEM parts for heavy-duty applications?

Quality aftermarket torque rods can match or exceed OEM specifications when sourced from reputable manufacturers. Look for torque rods made from forged steel with proper heat treatment and rubber bushings rated for at least 500,000 miles. Premium aftermarket options often feature improved bushing compounds and enhanced corrosion resistance. We carry torque rods that meet or exceed SAE J133 standards and are tested for commercial trucking demands.

Can I replace torque rods individually, or should I always replace them in sets?

While you can technically replace a single failed torque rod, we strongly recommend replacing them in axle sets (all rods on the same axle) for optimal performance and safety. Mismatched wear between old and new torque rods can cause alignment issues, uneven tire wear, and premature bushing failure. For best results and long-term cost savings, replace all torque rods on the affected axle simultaneously.

What torque specifications should I use when installing U-bolts on my T800?

Proper torque is critical for safety and component longevity. For standard 3/4" U-bolts, torque to 250-300 ft-lbs, and for 7/8" U-bolts, use 350-400 ft-lbs. Always tighten in a cross pattern and retorque after 50-100 miles of operation. These are general guidelines - consult your suspension manufacturer's specifications as some air ride and specialty suspensions may require different values. Never reuse U-bolts after removal, as they stretch during initial installation.

How do I know when my torque rods need replacement?

Common signs include excessive play in the bushings (more than 1/8" movement), visible cracks in the rubber, oil contamination on bushings, irregular tire wear patterns, and a wandering feeling while driving. During inspection, check for bent rod bodies, worn bushing sleeves, and any separation between rubber and metal components. Most torque rods last 300,000-500,000 miles under normal conditions, but severe-duty applications may require more frequent replacement.