Moog 340 Universal Joint - At Rear Axle or At Transmission

MOOG 340 Universal Joint Overview

The MOOG 340 universal joint is a driveline service part built for vehicles using the Spicer 1100 OE series. It features 4 round plain bearings, 0.938-inch bearing cap diameters, and a non-greaseable design for straightforward replacement in the drive shaft assembly. This MOOG 340 U-joint is a practical choice for driveline repair on applications such as Jeep Cherokee and Jeep Wrangler where the correct OE-style dimensions matter.

Key Features

• Part number: MOOG 340
• Universal joint for drive shaft service
• OE series reference: Spicer 1100
• 4 round plain bearings
• 0.938-inch (23.8 mm) bearing cap diameter on all axes
• 2.41-inch (61.2 mm) length on both axes, measured outside bearing to outside bearing
• Non-greaseable design
• Built with materials selected for dependable driveline performance

Detailed Description

MOOG 340 is a driveline universal joint engineered around the Spicer 1100 OE series dimensions. The 2.41-inch length on both axes and 0.938-inch bearing caps help ensure the correct fit in the drive shaft assembly when replacing a worn U-joint. For Jeep Cherokee and Jeep Wrangler driveline service, matching the bearing cap diameter and overall span is critical for proper installation and smooth operation. This part number 340 is designed for applications that use 4 round plain bearings and a non-greaseable configuration.

This part cross-references Spicer 5-101X for the same application.

What It Helps Fix

• Driveline vibration caused by worn bearing surfaces
• Clunking or looseness from excessive U-joint play
• Needle-bearing wear in the drive shaft connection
• Service issues on vehicles requiring a Spicer 1100-style universal joint
• Replacement needs for Jeep Cherokee and Jeep Wrangler driveline repair

Installation Notes and Tips

Confirm the existing joint uses 0.938-inch bearing caps and a 2.41-inch outside-to-outside length before installation. Verify the OE series match against the original driveline component, especially on Jeep Cherokee and Jeep Wrangler applications. Because this is a non-greaseable universal joint, routine lubrication through a fitting is not part of the design. Inspect the yoke, retaining hardware, and bearing seats for wear before installing MOOG 340.

Quality Assurance

MOOG backs this universal joint with materials selection and testing focused on reliable driveline service. The brand’s problem-solving design approach supports a smoother replacement process and consistent fit when the OE dimensions are matched correctly.