They can change the transmission, the transfer case, the driveshaft and/or its u-joints OR the wheelbase. Changing the transmission is very limited unless FCA wants to spend a lot of money and take a lot of risk, its NOT like there is a lot of unused spaced inside the ZF 8spd. The transfer case is a possibility. You could compact it and make it shorter. The driveshaft, the shorter the driveshaft the greater the angle at the u-joints as the axle goes up and down. U-joints have a maximum angle they can go to, exceed it, they bind up and destroy themselves or the drivetrain. There are different types and they can go to different angles, each with their positives and negatives. The bigger the angle the higher the cost. A Wrangler has 4 times the suspension travel of a Charger, and the Wrangler is a solid axle, while the charger has independent rear suspension, i.e. the driveshaft doesn't have to move up and down. A Wrangler has a front solid axle with a lot of travel, it will have to clear the engine, so if you push the engine forward the front axle has to go forward, i.e. longer wheelbase. The 4 door variant already has a longer wheelbase, the ZF 8spd won't be a problem for it. The 2 door variant has a short enough wheelbase, the ZF 8spd will be a problem for it. IIRC, Bob's article ruled out changing the trans, just too expensive/impractical/big of a risk. Compacting the transfer case or increasing the wheelbase seemed the most likely options, then possibly different u-joints that can go to greater angles might be an option. A bigger engine compartment? Remember the JL is suppose to be smaller. The engine compartment likely isn't going to be larger, if they push the engine forward, they will push the firewall with it. Bob (or maybe someone else) spoke about a design principal that Jeep has always stuck by that the firewall is at the trans/engine mating within a set distance, for a whole bunch of reasons. So if they don't push the windshield forward, then there will be a longer hood or plug/panel between the windshield and hood. If the windshield on the JL is going to be more raked back for aerodynamics, then you can move the base of the windshield forward with the firewall/engine and keep the top of the windshield at the same point, thus producing a greater rake. Something you don't see on the Mules, since they modify JK bodies to put on the JL chassis, and instead stick a longer panel between the base of the windshield and the hood.