Yukon Gear Chrysler 8.75in Sealed Ball Axle Bearing

This is the Yukon AK C8.75-GREEN, a single sealed axle bearing for the Chrysler 8-3/4 inch rear, the axle under many 1960s and early 1970s Dodge, Plymouth and Chrysler cars: Barracuda, Challenger, Charger, Road Runner, GTX, Dart, Duster, Coronet and the big C-bodies. It is the non-adjustable sealed design many owners know as a green bearing, sold as an alternative to the factory tapered bearing, threaded adjuster and seal setup. One kit services one side.

How axle bearings work in a Chrysler 8.75

The factory 8.75 holds each axle shaft with a tapered roller bearing pressed onto the shaft behind a retainer plate at the housing end. Because tapered bearings need a set amount of end play, the right side uses a threaded adjuster, and both shafts press inward against a thrust block in the center section. Setting that adjuster correctly is what keeps the shafts from walking in and out. A sealed bearing replaces the tapered bearing and its separate seal with one sealed unit that locates the shaft without the adjuster, which is why it is popular for drag cars and some disc brake conversions that do not tolerate axle end play or will not clear the adjuster.

Important: who this bearing is for

Yukon's own technical note states that these bearings are not recommended for daily driven vehicles or trucks, and that the OEM-style design, part AK C8.75-OEM, is the better choice for those uses. The tapered factory bearing is better at carrying the side loads a street car sees in corners. If your Mopar is a weekend or strip car, or your brake kit requires the sealed bearing, this is the right part. If it is a driver, look at our OEM-style 8.75 axle bearing, adjuster and seal kit instead.

Symptoms of a worn 8.75 axle bearing

• A growl or hum from one rear corner that rises with speed and changes when you load that side in a turn
• Gear oil on the inside of the brake backing plate or on the shoes, from a failed inner seal
• Clunking or a shaft that moves in and out when you push and pull on the drum or rotor
• Uneven brake pull or a soft pedal after oil reaches the linings
• Roughness you can feel when spinning the wheel by hand with the brakes backed off

How to confirm first

With the rear on stands, grab the tire at the top and bottom and rock it; noticeable play at the hub points at the bearing. Remove the drum and look for oil on the backing plate. A noise that comes and goes with steering load is usually a wheel bearing, while a noise that changes with throttle is usually the gears; our rear axle bearing noise and seal guide and Chrysler 8.75 problems guide cover both.

Fitment

Yukon lists this bearing for the Chrysler 8.75 rear with the 489, 741 and 742 carrier designs, including 1964-1974 Plymouth Barracuda, 1970-1972 Dodge Challenger, 1968-1972 Dodge Charger, 1966-1973 Dodge Dart, 1970-1972 Plymouth Duster, 1965-1973 Dodge Coronet, Polara and Monaco, 1965-1973 Plymouth Fury, 1967-1971 Belvedere and GTX, 1968-1972 Road Runner and Satellite, 1965-1973 Chrysler New Yorker and 1965-1968 Imperial. It is one bearing for one side; order two to do both. Housing ends and axle shafts were not identical across every car and year, so measure your shaft and the housing end before you press anything, and send us your year and VIN if you want us to check. More axle parts are in our rebuild kits section.

Install notes

• Pull the drum or rotor, unbolt the retainer plate through the axle flange and pull the shaft with a slide hammer.
• The old bearing and its retaining collar must be cut or pressed off the shaft. Never heat the shaft to remove or install a bearing.
• Press the new sealed bearing on squarely in a hydraulic press against the inner race only, then install a new retaining collar so the bearing cannot move on the shaft.
• Remove the factory adjuster when you convert; the sealed bearing locates the shaft without it. Check that your housing ends and backing plates suit the sealed bearing before final assembly.
• Install new inner axle tube seals while the shafts are out, refill the center section with 75W-90 gear oil, and clean any oil off the brakes.
• If the center section also needs work, our 8.75 741 master bearing kit and 8.75 crush sleeve eliminator kit cover the carrier and pinion side.

Is this a pair or a single bearing?

A single bearing. The kit services one side of the axle, so order two to do both sides.

Should I use this on my daily driven Mopar?

Yukon does not recommend these sealed bearings for daily drivers or trucks. For a street car, the OEM-style tapered bearing with the adjuster, Yukon AK C8.75-OEM or the complete adjuster and seal kit, is the better choice.

Do I still need the axle adjuster with this bearing?

No. The sealed bearing is non-adjustable and locates the shaft without the factory threaded adjuster, which is removed during the conversion.

Which 8.75 carriers does it fit?

Yukon lists it for 8.75 axles with 489, 741 and 742 carriers. Axle shafts and housing ends varied, so measure before pressing the bearing on.

Why do disc brake kits sometimes call for this bearing?

Some rear disc brake brackets will not clear the factory adjuster, and disc calipers do not like axle end play. A sealed bearing removes both issues, which is why some brake kits require it.