there are two seals, one at the end of the transmission and in front of the tranfer case. need to pull the driveline, pull vaccum lines and vent tube off the top of case. need to pull shift linkage off case, need a 9/16 wrench and take off 6 nuts that hold case to transmission. Oh, before that, take off two nuts at the bottom of the mount, lift the transmission, pull the mount out, and drop the transmission on the crossmember, this lowers the transmission down to get to the top nuts and easier to pull case. change the two seals and install back together. Good luck! handleing the t-case can be a lot of fun, not. I think its easier to put it on my chest and to install it put it up with your chest. If u use a jack, becarefull it doesn;t slide off.