Forum Discussion
Dadoffourgirls
Apr 11, 2014Explorer
Jim - In 2014, GM made the 4.10 axle standard. There was information that the 4.10 improved fuel economy over the 3.73 up to 60 mph. If all your driving is over 60, it was not going to be improved. If the majority of time you are under 60, it was better.
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