2008 Chrysler Aspen in Oklahoma City

How would you improve the fuel economy of a large four-wheel-drive SUV without sacrificing a V-8 engine, seating for eight, or the ability to pull 6000 pounds? If you're Chrysler, you add some fancy electric-drive technology and create the 2009 Dodge Durango and Chrysler Aspen Hybrids.

Outside of the familiar 5.7-liter 'Hemi' V-8, the majority of the powertrain - notably the electronically variable transmission - is nearly identical to what's found in the Chevrolet Tahoe and GMC Yukon Hybrids. Stemming from the partnership inked in 2005 between GM and (then) DaimlerChrysler, Chrysler's Two-Mode transmission differs only in its front and rear bolt patterns; the remainder - including most part numbers - is identical to GM's unit.

That gadgetry, however, isn't noticeable at first glance. Park a Durango or Aspen Hybrid next to a Durango or Aspen Limited, and you'll be hard pressed to tell one from the other. The only cues Chrysler gives are three small 'Hybrid' emblems, a stark contrast from the nine logos affixed to GM's full-size hybrid SUVs.

Chrysler has also avoided the "efficient" styling tweaks given to the part-electric Tahoe and Yukon. Hybrid Durango and Aspen models are, aside from powertrain, built identically to non-hybrid models.

That means no aluminum hood, no compact spare tire, and no aerodynamic tricks. Chrysler reps feel certain changes (particularly the spare tire) compromise the truck's ability, and engineers feel other inefficiencies need to be tackled before addressing the DurAspen's drag figures.... Read full article