The Mopar “Green” wheel bearing kit, identified as MO-400, is designed for use with 1965 and newer 8 3/4" axle shafts and Mopar Dana 60 passenger car applications. These bearings are intended as replacements for original tapered roller bearings and offer a snap ring style installation. Installation requires pressing the components onto the axle, and the documentation suggests a specific sequence of parts. The kits generally include the bearing, a retainer, and a seal, though some kits may also include a spacer.
Bearing Kit Components and Compatibility
The MO-400 kit includes components for a complete wheel bearing assembly. The documentation specifies compatibility with 8 3/4" axles found in A-body Mopars and Dana 60 axles. The bearings are designed for use with large bolt pattern axles. One user specifically mentions application to a 1970 Charger undergoing a rear disc brake conversion. The kits are also noted to be compatible with axles retaining the original axle buttons within the differential.
Installation Procedure
The installation of Mopar Green bearings requires a press and should not be attempted with hammers or chisels. The recommended installation sequence, based on available information, is as follows: flange, bearing, retainer, and then the seal. The seal’s position relative to the axle is noted as being inside the axle tube. For applications utilizing a spacer, the spacer is to be installed on the axle first, followed by the retaining plate, and then the bearing with the snap ring oriented towards the hub.
Considerations for Axle Preparation
Prior to installation, it is noted that, other than the lip seal, the bearings do not require greasing. Users preparing for installation should ensure they have the correct components – bearing, retainer, and seal – as supplied in the kit. The documentation does not specify any required axle preparation beyond ensuring compatibility with the 8 3/4" or Dana 60 axle types.
Potential Installation Challenges and Solutions
Several forum posts indicate that users may encounter questions regarding the correct installation procedure. One user specifically requested clarification on the order of components for Yukon axles. The consensus among forum responses emphasizes the necessity of a press for proper installation. A user performing a rear disc brake conversion on a 1970 Charger inquired about the placement of a spacer included with the kit, and received confirmation that the spacer should be installed first.
Additional Notes from User Experiences
User feedback suggests that the Green bearings fit well with factory A-body 8 3/4" differentials and axles, even when retaining the original axle buttons. One user highlighted a successful installation with a Right Stuff rear disc brake kit. Another user recommended seeking assistance from a machine shop to ensure proper pressing of the bearing components.
Conclusion
The Mopar Green bearing kit (MO-400) provides a replacement wheel bearing solution for 8 3/4" and Dana 60 axles. Proper installation requires a press and adherence to the specified component sequence: flange, bearing, retainer, and seal. Users should verify compatibility with their specific axle configuration and consider professional assistance if they lack the necessary tools or experience. The kits are compatible with existing axle buttons and are suitable for use with rear disc brake conversions.