Buick Century 1982-1996 Drivetrain Specifications

The 1982-1996 Buick Century features a front-wheel-drive drivetrain with various engine options, including the 2.5L Iron Duke inline-4 and the 3.8L V6. The transmissions available are the 4-speed THM200/200C automatic and the 5-speed Getrag 282 manual. The drivetrain includes a transverse-mounted engine, a transaxle, and a driveshaft connecting to the front wheels. Axle ratios vary between 2.84:1 and 3.33:1 depending on engine and model year. Compatibility with aftermarket parts may require specific matching of these components.

Regular maintenance for the Buick Century drivetrain includes fluid changes every 30,000 miles for the transaxle and differential. Inspect the driveshaft and universal joints annually for wear. Replace the CV joints if any clicking or vibration is detected. Ensure proper wheel alignment to prevent uneven tire wear and stress on drivetrain components. Refer to the service manual for detailed schedules and specifications.

To replace drivetrain components, start by safely lifting the vehicle and removing the exhaust system and heat shields for access. Disconnect the driveshaft from the transaxle and mark the alignment before removal. Replace the faulty component, ensuring all bolts are torqued to specifications. Reassemble in the reverse order of disassembly, and test drive the vehicle to check for proper operation. Consult a service manual for specific instructions and precautions.

Common drivetrain issues include vibration, noise, or loss of power. Check for worn universal joints, misaligned driveshaft, or damaged CV joints. Inspect the transaxle fluid level and condition, and look for signs of leakage. If vibration occurs, check tire balance and driveshaft alignment. For noise, inspect the exhaust system for leaks or damage. Refer to diagnostic codes from the OBD system for specific fault identification and repair.

Optimize drivetrain performance by ensuring proper fluid levels and using high-quality lubricants. Maintain correct tire pressure and alignment to reduce stress on drivetrain components. Avoid excessive load carrying or towing beyond specifications. Consider upgrading to synthetic fluids for improved thermal stability and wear protection. For enhanced performance, aftermarket drivetrain components such as high-strength axles or performance-oriented transmissions may be installed, following manufacturer specifications.