Because the Titan has so much power, you can get into trouble with your transmission during climbs. This is true of a lot of other trucks too. The truck has enough power to pull the hill in a higher gear, but your transmission will overheat from the stress. Also, if you don't have a transmission temp gauge, not only can you not monitor the transmission, you might not be able to tow more than around 7,000 pounds compared to the 9,000+ capacity of the big tow package. Big Tow has changed names, and some packages include the 3.36 gears (as opposed to 2.94) so if you are unsure, contact Nissan and they should be able to help you figure out for sure.

One way to check for gears is 70 mph test. 2000 RPM equals 3.36 and 1700 rpm equals 2.94 gears. That isn't set in stone, but it's a good indicator, as well as the tag on the differential.

If you do have a standard, non "Big Tow" with no convex mirrors or trans temp gauge, you can get a trans temp gauge like this one:
http://amzn.to/1DrKqjP

I would also recommend some kind of pod to house it nicely.

I also did a review on the Tekonsha Prodigy 3 controller, and this one has the Titan wiring harness included: http://amzn.to/1BWQXow

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