rear gears?
It all depends. You need to answer about a dozen questions to be sure. But in about 90% of the cases, the 3.54 is the better choice. Issues 9, 11 and 13 provide more detail on this issue. If you have a service body loaded with tools and compressors, and you pull a back-hoe for a living, and you live in the Sierra or Rocky Mountains, you probably want the 4.10. Certainly, the 3.54 is better for fuel mileage as the engine turns less rpm at highway speeds. Realize if you have a heavy load, the 3.54 may require your patience if and when you tow in the mountainous terrain. What percentage of the time will you be towing in mountains?
