- Home
- Kenworth Parts
- Kenworth T700 Parts
- Kenworth T700 Frame & Chassis
- Kenworth T700 Torque Rods & U-Bolts
Kenworth T700 Torque Rods & U-Bolts
Frequently Asked Questions About Kenworth T700 Torque Rods & U-Bolts
What are the signs that my T700 torque rods need replacement?
Common indicators include excessive driveline vibration, clunking noises during acceleration or deceleration, uneven tire wear, and visible bushing deterioration such as cracking, separation, or missing rubber. If your truck pulls to one side or you notice the rear axle shifting during turns, inspect your torque rods immediately. Regular visual inspections during oil changes can help catch issues before they become serious safety concerns.
Will aftermarket torque rods and U-bolts fit my specific T700 model year?
Most aftermarket torque rods and U-bolts for the T700 are designed to fit model years 2008-2019, but variations exist based on suspension type (Airglide, AG400L, or spring ride) and axle configuration. Always verify compatibility by checking your truck's suspension model number, typically found on the driver's side frame rail near the front suspension hanger. When ordering, have your VIN ready to ensure proper fitment, especially for trucks with specialized vocational specs.
Can I replace torque rods myself, or do I need special tools?
While torque rod replacement is possible for experienced mechanics, it requires specific tools including a torque wrench capable of 450-500 ft-lbs, proper jack stands rated for commercial vehicles, and ideally a bushing press for some applications. The job typically takes 3-4 hours per axle. Critical steps include maintaining proper pinion angle and ensuring correct torque specifications - typically 450-475 ft-lbs for most applications. Improper installation can lead to driveline damage, so many operators choose professional installation.
What's the difference between standard and heavy-duty torque rods?
Standard torque rods typically feature rubber bushings rated for general highway use, while heavy-duty versions use polyurethane or specialized rubber compounds rated for severe service, vocational applications, or high-mileage operations. Heavy-duty rods often feature thicker rod bodies (2.5" vs 2.25" diameter) and reinforced bushing ends. For trucks regularly exceeding 70,000 lbs GVW or operating in construction, logging, or heavy haul applications, heavy-duty rods provide 50-75% longer service life despite the higher initial cost.
How often should I retorque U-bolts, and what's the proper spec?
New U-bolts require retorquing after the first 50-100 miles, then again at 500 miles, and should be checked every 10,000 miles thereafter. Standard torque specifications for T700 U-bolts range from 300-350 ft-lbs for 3/4" bolts and 450-510 ft-lbs for 7/8" bolts, but always verify with your specific suspension manufacturer's guidelines. Use a cross-pattern tightening sequence and never reuse U-bolts that show any thread stretching, corrosion, or have been torqued more than three times.