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The Wrangler JK's V6s

From the weak 3.8 to the beloved 3.6 Pentastar

The Wrangler JK had two very different hearts across its decade: a weak, inherited 3.8 V6 through 2011, and the 3.6 Pentastar from 2012 on, which changed the car's character at the root.

3.8 EGH: the weak one

The 3.8-liter V6 (an old minivan architecture) moved the JK from 2007 to 2011 with just 202 hp and 237 lb·ft. Coarse, underpowered and thirsty, it was the early JK's most criticized point: fine at a crawl in the mud, but crying out for more power on any climb or on the highway.

With big tires this engine struggles even more: that's why on a built 3.8 JK a regear (lower axle ratio) isn't a luxury, it's nearly mandatory.

3.6 Pentastar: the leap

In 2012 came the 3.6 Pentastar V6 (DOHC, 24 valves) and it was a different car: 285 hp and 260 lb·ft, far more refined, flexible and capable on the road. Alongside it debuted the five-speed W5A580 automatic, and the JK's interior took a quality leap that same year.

The Pentastar is the engine the JK always deserved: it made the Wrangler usable daily without giving up anything off-road.

Specifications