Infiniti G35 2003-2006 Drivetrain Specifications

The 2003-2006 Infiniti G35 features a rear-wheel-drive (RWD) or optional all-wheel-drive (AWD) system, depending on the trim. The RWD models are equipped with a 3.5L V6 engine producing 260-298 horsepower, paired with a 5-speed automatic or 6-speed manual transmission. The AWD system, available on the G35x, uses a torque-split system for improved traction. The drivetrain is compatible with standard Infiniti parts and aftermarket upgrades designed for the VQ35DE engine platform.

Regular maintenance for the G35 drivetrain includes checking and replacing the differential fluid every 30,000-50,000 miles, inspecting the driveshaft and CV joints for wear, and ensuring proper transmission fluid levels. For AWD models, the transfer case fluid should be replaced every 60,000 miles. Additionally, routine inspections of the suspension and alignment are recommended to prevent uneven tire wear and drivetrain stress.

To replace the driveshaft, first, secure the vehicle on a lift or jack stands. Remove the exhaust system and heat shields for access. Unbolt the driveshaft from the differential and transmission using a socket wrench. Mark the driveshaft orientation for proper reinstallation. Install the new driveshaft, ensuring it aligns with the marked positions. Torque the bolts to the manufacturer's specifications, typically 40-50 ft-lbs. Reinstall the exhaust system and test drive to confirm proper operation.

Common drivetrain issues include vibrations during acceleration (indicating a worn driveshaft or unbalanced tires), whining noises from the differential (suggesting low or degraded fluid), and difficulty shifting (often due to worn transmission components). To troubleshoot, inspect the driveshaft for damage, check differential and transmission fluid levels, and ensure the clutch (on manual models) is functioning properly. If issues persist, consult a professional mechanic.

To optimize drivetrain performance, consider upgrading to a high-performance differential for improved traction, installing a lightweight driveshaft for reduced rotational mass, and using synthetic fluids for better lubrication and heat resistance. Regular alignment checks and tire rotations will ensure even wear and optimal power delivery. For AWD models, ensure the torque-split system is functioning correctly to maintain balanced power distribution.