2-speed rear axle
Create a rear axle differential with an electronically controlled 2-speed for city and highway driving that would enable an otherwise typical overdrive transmission to achieve even great fuel efficiency.
By: andy l.
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Total votes: 5
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Related Tags
differential
fuel economy
fuel efficiency

3 COMMENTS ON THIS IDEA
Mark I have a 2012 Dodge Ram with 5.7 liter hemi and 410 rear gear. I can't understand why this day in age there is not a 2 speed rear end so that when you are not pulling a load you can change the rear end gear so you can get better fuel mileage around town or on the highway. I am getting 16 in town and 17 on the highway. So much for averaging 21.
10 months(s) ago via
Nathaniel D Absolutely! I think this is extremely useful.
1 year(s) ago via
Robert Walton With the advent of computer controlled transmissions for optimum power and fuel efficiency, a 2 speed axle would give the awe inspiring performance for racing/towing with the availablity of meaningful fuel efficency on the highway...seems like a no-brainer! Can't imagine this isn't a viable solution to improve fleet MPG averages to meet gov mandated improvements...
2 year(s) ago via
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