I own a 2001 2500 LD 5 speed manual transmission 4x4. I want to know what size is the front differential and what size is the rearend. How can I confirm this? Can I measure something? Any help is appreciated.

 

The specs I have are for a 1500HD,2500LD but with the 4L80E and LQ4. You have the 5 speed so I am not sure if they are the same or not.

Front Diff: AAM925: 235mm Ring Gear, Axle Torque Capacity 6300Nm, Gear Ratio Range 3.42-4.56.

Rear Diff: AAM950: 240mm Ring Gear, Axle Torque Capacity 6800Nm, GAW rating 2700Kg, Gear Ratio Range 2.93-4.88.

 

I have this truck, as far as i know you will have the 10.5 rear with 4.10 gears and the 9.25 front. Hope this helps