Jeep Cherokee 1997-2001 Drivetrain Specifications

The 1997-2001 Jeep Cherokee features a part-time 4WD system with options for Command-Trac or Select-Trac. It includes a Dana 30 front axle and a Dana 35 or Chrysler 8.25 rear axle. The transfer case is either an NP231 (Command-Trac) or NP242 (Select-Trac). It is compatible with engines like the 4.0L inline-6 and 2.5L inline-4. Ensure compatibility with specific models and trims for upgrades or replacements.

Regular maintenance includes checking and replacing transfer case fluid every 30,000 miles, inspecting axle seals for leaks, and ensuring proper lubrication of U-joints. Differential fluid should be changed every 50,000 miles. Monitor driveshaft balance and alignment, and inspect CV joints for wear. Adhering to this schedule ensures optimal performance and longevity of the drivetrain components.

To replace the transfer case, disconnect the driveshafts, remove the crossmember, and unbolt the transfer case from the transmission. Drain the fluid beforehand to avoid spills. Install the new transfer case by reversing the steps, ensuring proper alignment and torque specifications. Refill with the recommended fluid and test for leaks and proper operation.

Common issues include worn U-joints causing vibrations, leaking axle seals, and transfer case fluid contamination. Noisy differentials may indicate worn gears or insufficient lubrication. Diagnose vibrations by inspecting driveshaft balance and alignment. Check for leaks at seals and gaskets, and replace contaminated fluids promptly to avoid further damage.

Optimize drivetrain performance by upgrading to synthetic fluids for better lubrication and heat resistance. Install a slip yoke eliminator (SYE) for lifted vehicles to reduce vibrations. Ensure proper alignment and balance of driveshafts. Regularly inspect and maintain U-joints, CV joints, and seals. Consider upgrading to stronger axles for off-road use.