The rear end of a Jeep Grand Cherokee is a crucial component that affects the vehicle's performance, handling, and off-road capabilities. Most Grand Cherokees come equipped with either a Dana 35 or Dana 44 rear axle, depending on the model year and trim level.

Rear Axle Options

The Dana 35 is the most common rear axle found in Grand Cherokees, particularly in earlier models and lower trim levels. It's suitable for everyday driving and light off-roading but may not be ideal for heavy-duty use or larger tires. The Dana 44, found in some higher-end models and those with tow packages, offers increased strength and durability.

Dana 35 Characteristics

  • 27 spline axles (upgradeable to 30 splines)
  • Suitable for tires up to 33 inches
  • Centered differential location
  • 5 on 4.5-inch lug pattern

Dana 44 Advantages

  • Stronger construction
  • Better suited for larger tires and more aggressive off-roading
  • Often comes with limited-slip differential
  • Some models feature an aluminum center section (D44a)

Suspension and Ground Clearance

The rear suspension of the Grand Cherokee plays a significant role in its performance. Many models offer:

  • Standard suspension with 9.1 inches of rear axle clearance
  • Air suspension option providing up to 11.7 inches of clearance

Common Issues and Upgrades

Some Grand Cherokee owners may experience:

  • Clunking noises when shifting or at low speeds
  • Whining sounds at higher speeds
  • Premature bearing wear

Popular upgrades include:

  • Installing a limited-slip differential
  • Upgrading to stronger axle shafts
  • Adding a locker for improved off-road traction

Maintenance Tips

To keep your Grand Cherokee's rear end in top condition:

  • Regularly check and change differential fluid
  • Inspect U-joints and replace if worn
  • Pay attention to unusual noises or vibrations
  • Consider upgrading if planning significant modifications or heavy off-road use

FAQs About Jeep Grand Cherokee Rear Ends

    • How can I tell if my Grand Cherokee has a limited-slip differential?
      Jack up both rear wheels and turn one. If the other wheel turns in the same direction, you have a limited-slip diff.
    • Is the Dana 35 reliable for off-roading?
      It's adequate for light to moderate off-roading, but may not hold up to extreme use or larger tires.
    • Can I upgrade my Dana 35 to handle more power?
      Yes, aftermarket kits are available to strengthen the Dana 35, often called "Super 35" upgrades.