Get the power you need, contained in Wrangler Unlimited's reliable 3.8L overhead valve 60-degree V6 engine. The workhorse for all models is a 3.8L SMPI V6 engine that provides robust performance and durability. The available four-speed automatic transmission offers the freedom of smooth hands-free shifting. A six-speed manual transmission comes standard on all models. Wrangler's Electronic Throttle Control system's special off-road calibrations help the driver to "feather in" the throttle over uneven terrain, logs and rocks.