2012 2012 Jeep Wrangler To Apply 3.6-liter V6 Pentastar

Jeep Wrangler reported to apply 3.6-liter V6 Pentastar for 2012 model.
The automatic speed of 2012 model will also replaced from 4-speed to 5-speed, however there is a question, why is only 5-speed not to 5-speed like others ?

Good news from the Jeep Wrangler is finally launched the brand new variants, 3.6-liter V6 Pentastar for model 2012.
Since 2007, the Wrangler has been struggling in the class 3.8-liter V6 engine, which replaces the old engine type 4.0-liter inline six. To be sure, the most interesting news is the four-speed automatic Wranger will be replaced by a five-speed unit.
All units are quite nice. The problem is, why the Wrangler is still playing in the realm of five-speed, when all producers are developing a standard six-speed?
In other cases, the 2012 Wrangler is synonymous with the unit powertrain 2011 Grand Cherokee. Is the engine with 290 horsepower and 260 pound-feet of torque. Lucky 2012 Grand Cherokee will uses the six-speed automatic to replace the five-speed model 2011.

2012 Jeep Wrangler Get Pentastar, Pentastar on 2012 Jeep Wrangler