Spicer 2-2-1949 1310 Series 4-Bolt Flange Yoke (3.750" Bolt Circle, 2.558" Male Pilot)

Eliminate failure-prone factory velocity (CV) joints, upgrade to a rugged traditional u-joint setup, and restore high-torque reliability with this genuine Spicer 1310 Series 4-Bolt Flange Yoke. Engineered as a high-durability, original equipment manufacturer (OEM) component by Dana, this premium conversion flange (Part Number: 2-2-1949) is built to withstand high rotational torque loads and demanding off-road trail conditions.

On modern four-wheel-drive vehicles like the Jeep Wrangler JK, the original factory front driveshaft utilizes a delicate, boot-enclosed CV ball joint at the differential connection. While smooth on stock pavement setups, these factory rubber boots are highly vulnerable to tearing once the vehicle is outfitted with an aftermarket suspension lift. Once the boot splits, trail mud, grit, and road salt contaminate the internal bearings, causing rapid joint failure, severe mid-chassis vibrations, and dangerous binding. This authentic Spicer flange yoke solves that vulnerability completely. It bolts directly over your stock factory companion flange, serving as a solid mechanical bridge that lets you upgrade to a high-strength, traditional 1310 series universal joint driveshaft without changing out your expensive pinion companion flange or disturbing the internal differential bearing preload setup.

Precision-cast from premium structural alloy steel and perfectly balanced to exact factory blueprint specifications, the 2-2-1949 features a 3.750-inch bolt circle configuration with four drilled 0.481-inch holes designed for 12 mm hardware. It relies on a precision-ground 2.558-inch male pilot register to guarantee perfect concentric alignment against the matching mating flange, completely eliminating rotational runout and high-speed undercarriage harmonics. Dimensioned explicitly for the globally trusted 1310 Series driveline architecture, it features an outside snap ring (OSR) layout designed to securely cradle standard 1.062-inch diameter universal joint bearing caps. Sourcing this genuine OEM component ensures your custom driveline upgrades fit flawlessly the first time.

Component Highlights:

• CV to U-Joint Conversion Essential: Allows you to upgrade a failure-prone factory companion flange over to a trail-ready, heavy-duty 1310 universal joint driveshaft configuration.

• Flawless Rotational Alignment: Engineered with a precision-machined 2.558-inch male pilot to self-center perfectly within the mating flange, mitigating structural runout and protecting internal pinion bearings.

• Genuine Spicer Blueprint Tolerances: Cast from high-tensile steel and pre-balanced from the factory to eliminate high-speed vibration and reduce driver cockpit fatigue.

• Drop-In Suspension-Lift Solution: Provides the maximum angular clearance needed to handle up to 4 inches of suspension articulation without binding or yoke-ear interference.

Drivetrain & Dimensional Specifications:

• Driveline Series Architecture: 1310 Series (3.219" cap-to-cap snap ring span | 1.062" bearing cap diameter).

• Flange Configuration Style: Square 4-Bolt Flange.

• Bolt Circle Diameter (BCD): 3.750 inches.

• Hole Spacing (Center-to-Center): 2.652 inches (Horizontal & Vertical).

• Bolt Hole Diameter: 0.481 inches (Equally spaced for 12 mm bolts).

• Pilot Register Diameter & Type: 2.558 inches (Male Pilot / M).

• Centerline of Joint to Flange Face: 1.781 inches.

• Outside Yoke Width Dimension: 3.469 inches.

• Compatible U-Joint Kits: Spicer 5-153X (Greaseable), 5-1310X (Non-Greaseable), or 5-3613X (Coated for Aluminum Shafts).

Primary Vehicle & Custom Applications:

• Jeep Wrangler JK & JK Unlimited: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, and 2018 4x4 models (Mounts to factory stock front differential pinion companion flange to accommodate upgraded 1310 driveshafts).

• Multi-Platform Adaptation: Fits select Dodge Durango and various Nissan 4x4 truck transfer case/differential outputs requiring a 3.750" bolt circle 1310 flange arrangement.