This procedure applies to both the front and rear seals of the
Transfer Case. It is not necessary to remove the transfer case to replace a seal. To begin, raise the vehicle and support it securely on jackstands. If replacing the front Transfer Case Seal, remove the front driveshaft; if replacing the rear seal, remove the rear driveshaft. Unstake and remove the companion flange retaining nut, then remove the companion flange. If the flange is difficult to remove, use a puller. Pry out the seal with a screwdriver or seal removal tool, being careful not to damage the seal bore. Lubricate the new seal lips with petroleum jelly and drive the seal into place with a large socket or seal installer tool. There is also a smaller seal inside the companion flange that may need to be replaced. The remainder of the installation is the reverse of removal, making sure to tighten the companion flange nut.