* Dana 80: This was a very heavy-duty rear axle, often found in higher payload and towing capacity models.
* AAM 11.5": Another heavy-duty option, also frequently used in high-capacity trucks.
To know for sure what rear end is in *your* specific 2006 Dodge 3500, you need to check one of the following:
* The vehicle's build sheet (if available): This would explicitly state the rear axle type.
* The sticker on the driver's side doorjamb: This sticker often contains information about the truck's specifications, though it might not list the exact axle type.
* The axle itself: Look for a casting number stamped on the differential housing. This number can then be cross-referenced with online resources or parts catalogs to identify the axle.
* Your vehicle's owner's manual: It might list specifications including the rear axle.
Without additional information about your specific truck's configuration, it's impossible to say definitively.
