Spicer Dana 60 & 61 Front Axle Upper Kingpin Bushing Spring Retainer Plate (1975-1999 Ford, GM & Dodge)

Restore correct knuckle alignment, maintain critical steering preload, and eliminate high-speed front-end shimmy with this genuine Spicer Upper Kingpin Bushing Spring Retainer Plate. Specifically engineered as a direct original equipment manufacturer (OEM) replacement component, this high-durability stamped steel plate (Part Number: 620180) is designed to fit classic open-knuckle solid Dana 60 and Dana 61 front steering axles utilized across vintage Ford, GM, and Dodge heavy-duty trucks.

On a classic kingpin solid front axle, front-end stability depends entirely on a constant vertical load applied to the upper steering knuckle components. Inside the top knuckle cap, a high-tension coil spring pushes down against this specialized spring retainer plate, which in turn centers and seats firmly against a tapered nylon kingpin bushing. Over years of grueling commercial service, heavy snowplowing, or hard off-road trail riding with oversized tires, this plate takes a massive beating. Constant cyclic loading can cause the retainer plate to rust, warp, thin out, or pit. When the plate loses its structural integrity, the tension spring can slip out of absolute center alignment, drastically reducing the preload on the upper knuckle. This loss of tension introduces immediate steering slack, resulting in uneven front tire wear, aggressive lane wander, and violent front-end steering oscillations commonly referred to as "death wobble."

Sourcing a genuine Spicer 620180 retainer ensures an exact factory press-fit and perfect metallurgical strength. Built from premium heavy-gauge carbon steel, this plate is stamped to the precise depth required to capture and hold your internal pressure spring securely in place, even under severe axle articulation and impact loads. Whether you are performing a complete front axle overhaul or chasing down front-end slack on a classic work truck, installing a brand-new, factory-correct retainer plate guarantees your steering knuckle geometry performs exactly to original blueprints.

Kit Highlights:

• Maintains Core Preload Tension: Anchors the upper kingpin pressure spring directly inline, preventing internal hardware walk and ensuring continuous downward force onto the nylon steering bushing.

• Cures Loose Steering & Shimmy: Restores the factory-specified tension profile inside the knuckle assembly to instantly clear up front-end wandering, lane drift, and loose tire oscillations.

• Genuine Spicer OEM Quality: Precision-stamped by the vehicle’s original drivetrain supplier to mirror factory structural limits, ensuring a perfect drop-in fit over aftermarket alternatives.

• Heavy-Duty Construction: Fabricated from high-tensile structural steel to prevent cracking, distortion, or premature collapse under heavy payload tracking and rough terrain conditions.

Vehicle & Axle Fitment:

• Axle Profile: Open-Knuckle, Solid Front Dana 60 and Dana 61 Axles running classic upper spring-loaded kingpin configurations. Does not fit later ball-joint style axles, newer generation Super Duty housings, or AAM front axles.

• Ford Super Duty / Trucks: 1978 to 1998 Ford F-250 and F-350 4x4 heavy-duty truck platforms with kingpin Dana 60 front axle housings.

• GM / Chevrolet Trucks: 1979 to 1991 K30, K3500, and V3500 1-ton 4x4 heavy-duty trucks.

• Dodge Trucks: 1975 to 1993 Dodge W200, W250, W300, W350, D600, and D700 4x4 models running Dana 60 or Dana 61 front axles.

• Position: Front Axle Steering Knuckle Assemblies — Top Kingpin Cover Compartment (Left or Right Side). Note: Two plates are required to service the entire front axle housing.