Dorman BJ85045RD Suspension Ball Joint - Front Lower

Dorman RD Front Lower Ball Joint

Dorman RD BJ85045RD is a front lower suspension ball joint for specified Ford F-150 and Lincoln Mark LT applications. It is built for severe-duty service where suspension reliability matters under towing, hauling, off-road use, and other demanding conditions.

The RD, or Rugged Duty, product line is Dorman’s heavy-duty chassis range for vehicles that see harder-than-normal service. For this application, BJ85045RD uses a quenched and tempered steel housing with a protective finish, plus corrosion-resistant hardware and a preloaded grease boot design to support long-term service in harsh environments.

• Front lower suspension ball joint for specified applications
• Rugged Duty line for severe-duty use
• Quenched and tempered steel housing
• Protective coating for improved corrosion resistance
• Greaseable design with premium grease preloaded in the boot
• Press-in mounting type with threaded stud
• Castle nut, dust boot, cotter pin hole, and mounting hardware included
• Part number: BJ85045RD

Detailed Product Information

Compatible with 2004-2008 Ford F-150, front lower, and 2006-2008 Lincoln Mark LT, front lower, this Dorman suspension ball joint is engineered as a direct replacement for failed original equipment on the listed vehicles. The steel construction, corrosion-resistant coating, and sealed grease retention features are intended to support durability in work-truck and emergency-service conditions. BJ85045RD is a threaded, press-in lower ball joint with a taper-style stud and premium suspension grade construction.

This part cross-references MOOG Chassis Products K80149 for the same application.

Common Repair Symptoms

• Front suspension clunking or popping over bumps
• Excessive play in the lower control arm joint
• Uneven tire wear caused by worn suspension geometry
• Loose or unstable steering feel at the front end
• Inspection failure from worn lower ball joint components

Installation Notes and Tips

Press-in installation is required for this lower ball joint. Verify the control arm and knuckle condition before installation, and confirm the correct fitment by year, make, model, and front lower position before service. Use the included castle nut and mounting hardware as specified for the application, and follow the vehicle service procedure for torque and alignment checks after installation.

Quality Assurance

Dorman RD chassis components are built for severe-duty service with corrosion-resistant materials and protective finishes. BJ85045RD is designed for demanding Ford F-150 and Lincoln Mark LT front suspension applications where dependable replacement parts are required.