Dodge Ram rear axles are available from a variety of sources, including local dealership service centers, Randy's Worldwide Automotive and Summit Racing. All three sources for Dodge Ram axles carry original manufacturer equipment parts as of 2015.
If upgrading the strength of the axle is desired, the local dealership service center will not be able to meet that need. Aftermarket parts are available from companies like Randy's Worldwide Automotive and Summit Racing. Both companies sell Dodge Ram axles that have higher strength ratings than original equipment axles. Aftermarket parts are often priced below original equipment replacements because there is greater competition for aftermarket parts.