We know a new Jeep Wrangler is on the way, and now we've got some confirmation of its long-rumored aluminum content. According to a leaked internal memo from panel supplier Alcoa, the 2018 Wrangler will have front and rear doors with aluminum inner structures and an aluminum hood. The intel was leaked to the popular JLWrangler forum.

Of course, this memo only indicates a limited number of aluminum panels from a single supplier. It’s hard to say what other steel parts will be replaced with lightweight aluminum, but the new information is on track with what Fiat-Chrysler CEO Sergio Marchionne has said in the past.

Judging from what we’ve seen from spy shots, the new Wrangler could also harbor a long-rumored diesel engine under the aluminum hood. The diesel engine likely would be the 3.0-liter used in the Ram 1500 EcoDiesel and could be a trail driver’s dream with 420 lb-ft of torque just off idle. The aluminum body panels would also be a welcome addition to the still-rumored Wrangler-based pickup truck, which is looking to be less of a rumor and more of a reality for the next generation Jeep.

More details are sure to come about the next-generation Wrangler as it inches closer to its 2018 launch.

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