* Dana 60: This was a common heavy-duty rear differential in the 1999 Ram 2500, particularly in higher-payload/towing configurations. It's known for its strength and durability.
* Dana 70: Also a heavy-duty option, but typically found on even heavier-duty trucks or those with specific towing packages. Even stronger than the Dana 60.
* Chrysler 8.25-inch: A less heavy-duty option, sometimes found in lower-spec 2500 models. Not as robust as the Dana 60 or 70.
To determine the specific differential in *your* 1999 Dodge Ram 2500, you should:
1. Check the Door Jamb Sticker: This sticker usually lists the axle ratio (like 3.54, 3.73, 4.10, etc.) and sometimes will indicate the type of differential.
2. Look at the Differential Housing: The differential housing itself might have a casting number which can be used to identify it (this requires crawling under the truck).
3. Consult a Dodge Parts Catalog: Using the VIN, you can look up the original specifications for your truck.
Without knowing the specific trim level and options of your truck, it's impossible to definitively state which differential it has.
