I have a 2wd crew cab 07+ nnbs. I have the 3.73 open rear diff (non locking)with drum brakes. I was wondering if there was anyone with a lifted 2wd with 3.23 rear diff that would like to trade axles with me? The 3.73 gear ratio would probably be better for you if you have big wheels and tires! i am going the lowered route so I don't need such a low gear ratio. I live in the Phoenix area of Az and we could do the swap at my house. I think it would take a couple of hours to swap out the axles. Let me know.