Infiniti QX70 2014-2017 Drivetrain Specifications

The 2014-2017 Infiniti QX70 features an intelligent all-wheel-drive (AWD) system as standard, with a rear-wheel-drive (RWD) option. The AWD system includes a torque split of 50:50 under normal conditions, with the ability to transfer up to 50% of torque to the front wheels when needed. The drivetrain is paired with a 7-speed automatic transmission and is compatible with the 3.7L V6 engine (330 hp) or the 5.0L V8 engine (390 hp).

Regular maintenance for the Infiniti QX70 drivetrain includes checking and replacing the transfer case fluid every 30,000 miles, inspecting the driveshaft and CV joints for wear, and ensuring the AWD system is functioning properly. Transmission fluid should be replaced every 60,000 miles, and differential fluid should be changed every 30,000 miles. Always refer to the owner’s manual for specific intervals and procedures.

To replace drivetrain components, first, lift the vehicle securely using a jack and stands. Remove the underbody panels to access the drivetrain. For the driveshaft, unbolt it from the differential and transmission. For the transfer case or differential, drain the fluid, unbolt the unit, and carefully lower it. Install the new component, ensuring proper alignment and torque specifications. Refill fluids and test the system for leaks or abnormal noises.

If your drivetrain is making noise, first identify the source. A humming noise may indicate worn wheel bearings or differential issues, while clunking could point to a failing driveshaft or CV joint. Check for loose or damaged components, inspect fluid levels, and ensure proper lubrication. If the issue persists, consult a professional technician for a detailed diagnosis and repair.

To optimize drivetrain performance, ensure regular maintenance, including fluid changes and component inspections. Use high-quality synthetic fluids for the transmission, transfer case, and differential. Upgrade to performance tires for better traction and handling. Avoid aggressive driving to reduce wear on drivetrain components. Consider a professional tune-up to ensure the AWD system and transmission are operating at peak efficiency.