Chrysler axle gear ratios are identified several ways dependent upon the axle manufacturer, year, and type. Shown below are the most common types of axle tags:
AAM Axles are primarily used in Ram Trucks and Dodge Trucks.
The photograph below is from a 2011 Ram 3500 Pickup. Notice that the axle tag is located on the upper right side axle tube.
Chrysler designed axles, also known as "Corporate Axles" are identified the same way as the AAM axles shown above for many 2004 and above axles. The photograph below is of a 2011 Ram 1500 Pickup with a Corporate 9.5" axle
The tag shown below is from the top if the right hand rear axle tube of a 2008 Jeep Liberty. The tag reads 3.73, if you look up a 2008 Jeep Liberty axle gear ratio table, you will see that the 3.73 corresponds to a 3.73 gear ratio.
Prior to 2004, most Corporate Axles had a metal tag bolted to the axle cover. See the third photo shown below. The tag shown below if from a 1999 Dodge Durango. Notice the tag reads "3.5', if you look up the possible gear ratios for a 1999 Dodge Durango, you will see that the 3.5 corresponds to a 3.55 gear ratio.
The independent suspension rear axle shown below from a 2005 Chrysler 300C, is called a 198RII because it uses a 198mm ring gear, it is the rear axle, it is made of iron, and it is used with an independent rear sispension system. the gear ratio is identified by a label attached to the housing. It could also be stamped into the rear aluminum cover on some models.
The axle tag indicates that this axle has a 3.64:1 gear ratio.
Dana axles are used in Heavy Chassis Cab trucks and Jeep Wrangler. Dana axles have also been used in other Jeeps over the years.
Dana axle gear ratios are identified by either a metal tag as shown below or by a label attached to the axle tube. The axle shown below is a 2010 Jeep Wrangler Rubicon. The axle identification label has been painted black and there is no metal tag to identify the gear ratio. To identify the gear ratio, hoist the vehicle with the transmission in neutral. Count the number of propeller shaft rotations it takes to make the rear wheels rotate one time. For 2010, there are only two possibilities: 3.21 or 4.10.
Older Dana axles use a metal identification tag to indicate the gear ratio. The example shown below from a 1999 Jeep Grand Cherokee shows a 3.73:1 gear ratio.
This page was last modified Tuesday, November 19, 2013 10:02:04 PM
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