The transfer cases in most passenger vehicles connect the output from transmission to the drive shaft and transmit rotation and torque from the engine to transmission and then to the axle and wheels. But four-wheel drive vehicles are a bit different. They require transfer cases that can delivery power equally to the front and rear drive shafts. Because they are bigger, tougher, and do more work, transfer cases for Jeep Wranglers are more expensive than stock models. The replacement and upgrade kits we sell range from a couple hundred to a couple thousand dollars. The unit you need depends on the types of off-roading activities you enjoy. Drivers who participate in more aggressive activities, such as rock crawling, may require more rugged and expensive transfer cases.