I'm buying a used 2010 JK sport and was trying to find out if it has a 3.73 or 3.21 gearing ratio. I called 1-877-IAMJEEP and they said they can't tell me anything until I am the registered owner. I am brokering the deal through the current owner's son because the current owner is very ill and out of state. The son does not know the ratio off hand. I could wait until next week when the sale closes but I was kind of curious. Is there any way to tell from the hitch? I understand (perhaps incorrectly) that the towing package in 2010 came with 3.73 gearing. Is that correct? Here is a picture of the harness if that makes a difference. Also, it is a manual transmission if that helps.