Kingpin rebuild kit for both sides of a Dana 60 front axle with kingpins, bearings, races, seals, bushings and springs. Fits 1975-1993 GM, Dodge and Ford.
A 3/4-ton or 1-ton 4x4 from the late 1970s through the early 1990s with a Dana 60 front axle that wanders on the highway, clunks over bumps, eats the edges of the front tires, or shakes hard after hitting an expansion joint usually has worn kingpins. This kit rebuilds both steering knuckles on a kingpin-style Dana 60. It fits 1977-1991 Chevrolet and GMC, 1975-1993 Dodge, and 1976-1991 Ford trucks, and the 18 pieces replace Spicer 706395X along with 37302, 37307, 41886, 620180 and 37300. For each side you get the upper kingpin, the lower tapered bearing and race, the upper and lower seals, the lower grease cap, the upper spring and spring retainer plate, the upper bushing and the cap gasket.
Before ball joints took over, the Dana 60 front axle pivoted each steering knuckle on a pair of kingpins. The lower pin rides in a tapered roller bearing pressed into the axle yoke, and the upper pin threads into the yoke and sits in a bushing in the knuckle, with a spring under the top cap keeping load on it. This layout is stronger than a ball joint and handles big tires well, but it depends on the bearing preload and the upper bushing staying tight. When the lower bearing wears or the upper bushing goes oval, the knuckle can rock on the yoke. That play changes camber and toe as the truck moves, which is what you feel as wander, bump steer and, on lifted trucks with large tires, a violent front-end shake.
Jack the front axle so the tires are off the ground, grab the tire at the top and bottom, and rock it. If the knuckle moves on the axle yoke, the kingpins and bearings are worn. Have a helper rock the tire while you watch: movement at the hub center with the knuckle steady is a wheel bearing, not the kingpins, and the Dana 60 front wheel bearing and seal kit is the right part for that. Also check the track bar, tie rod ends and steering box mounts, because loose steering parts cause the same wander and shake.
This kit is listed for the kingpin-style Dana 60 front axle on 1977-1991 Chevrolet and GMC, 1975-1993 Dodge, and 1976-1991 Ford 3/4-ton and 1-ton 4x4 trucks, and it covers both sides. It does not fit the later ball-joint Dana 60 fronts used on newer Ford Super Duty and Ram trucks. Look at the top of your knuckle: a kingpin axle has a bolted cap with a spring under it, while a ball-joint axle has joints pressed into the knuckle with a castle nut on top. If you have swapped axles or are not sure what is under the truck, send us the year and VIN before ordering.
After the rebuild, have the front end aligned. Fresh kingpins only hold an alignment that has been set correctly. A nodular iron Dana 60 cover is worth adding if the truck sees trail use.
| Fits | Dana 60 kingpin front axle: 1977-1991 Chevy/GMC, 1975-1993 Dodge, 1976-1991 Ford |
| Replaces | 706395X, 37302, 37307, 41886, 620180, 37300 |
| Covers | Both sides (left and right knuckle) |
| Includes | 2 kingpins, 2 lower bearings and races, upper and lower seals, 2 lower grease caps, 2 upper springs, 2 upper bushings, 2 spring retainer plates, 2 cap gaskets |
| Pieces | 18 |
| Weight | 4.83 lb |
Yes. It has 18 pieces covering both the left and right knuckles: two kingpins, two lower bearings and races, seals, grease caps, springs, bushings, retainer plates and cap gaskets.
Kingpin-style Dana 60 front axles on 1977-1991 Chevrolet and GMC, 1975-1993 Dodge, and 1976-1991 Ford 3/4-ton and 1-ton 4x4 trucks. It does not fit ball-joint Dana 60 axles.
It replaces Spicer 706395X plus 37302, 37307, 41886, 620180 and 37300.
Yes. Play in the knuckle lets toe and camber change as the truck moves, which can start a violent shake, especially on lifted trucks with big tires. Check the track bar and tie rods too, because they cause the same symptom.
Yes. The upper kingpin is installed at very high torque, so you need a kingpin socket, a long breaker bar or torque multiplier, a race driver, and the factory service manual torque and preload specs.
