I have a 2008 Nissan Titan V8 Pro4x.. It has been modified with aftermarket Rancho suspension and Firestone inflatable airbags.. It has a 7 pin wire harness connector and towing side mirrors. The code on the door jamb says the rear axle is a CC 33. There is no visible stickers to indicate the gear ratio. I read that a way to confirm that it is a 3.36 gear ratio is to take it up to 70 MPH and if the RPMs hover at 2000, then you do in fact have the 3.36 gear ratio designed for better towing. My truck stayed dead on 2000 RPMs with the cruise control maintaining 70 MPH... With all this said my truck has a GVRW of 7200.. What else can i do (if anything) to this truck to get it to pull 9000 + pounds like its big tow package counterpart?? Any input would be appreciated! Thx