While it may look like your average JK from the exterior, its not.
So whats hiding under that JK body? In all likelihood, chassis and suspension improvements as well as lighter materials.
Fanboys have admittedly been worried since it was rumoured that the JL would adopt a unibody, all aluminium construction. Don't worry, the changes aren;t nearly as radical as threatened.
JL keeps its solid front and rear axles as well as its body on frame construction. Spy photos confirm this much. By the looks of it the JL is using new axles, new suspension geometry and a new exhaust. Otherwise the JL appears as the JK, Dana axles suspended by coil springs and a boxed frame are hallmarks of the Wrangler.
On the powertrain front we've heard that Jeep worked to make sure that the ZF 8 speed will play nicely with the JL platform, something not possible with JK. There are also rumblings that should JK loose enough weight FCA would consider a 4 cylinder gasoline engine as base. The new Pentastar will find its way underhood but the most interesting rumour is a new diesel 4.
Look for the JL to debut late 2016, retooling is already underway at the Toledo factory. Expect a mild price increase should the JL adopt an aluminium body.