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Previous Thread Next Thread Print Thread Rate Thread YJ transfer case rear output seal replacement? #791020 02/20/07 01:53 PM Joined: Feb 2007 Posts: 32 X x89yjx OP Getting the Wheeling Fever yesterday i noticed i had jeep blood splashed in a perfect line across the underside of my jeep. looks like it is leaking out the tailshaft and being thrown around by the u joint. how do i solve this problem? should i just replace the seal or is there more i should address? special tools...rtv? at the moment it is my daily driver and must be fixed my thursday night. Re: YJ transfer case rear output seal replacement? [Re: x89yjx] #791021 02/20/07 11:47 PM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler Quote yesterday i noticed i had jeep blood splashed in a perfect line across the underside of my jeep. looks like it is leaking out the tailshaft and being thrown around by the u joint. how do i solve this problem? should i just replace the seal or is there more i should address? special tools...rtv? at the moment it is my daily driver and must be fixed my thursday night. I NEVER use rtv on a SEAL! It is a simple matter to drop the driveshaft and pull the yoke and then remove the seal and install the new one.. I always use a short piece of pipe or a large socket to beat on so the seal will be installed straight and not warp under hammer stress. Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" /> professional bovine relocation specialist Re: YJ transfer case rear output seal replacement? [Re: BigJim] #791022 02/21/07 12:24 AM Joined: Feb 2007 Posts: 32 X x89yjx OP Getting the Wheeling Fever awesome thankyou. i replaced the seal...no problem whatsoever. made a drift from some of that pipebomb pipe with an endcap to strike with a hammer. afterwards it was still leaking...upon closer inspection i noticed my housing extension actually had a crack in it.$37 part at dealership and repeat steps 1-5. done deal. next week: rear main seal. any tips or tricks?(besides don't scratch the crank or bearings) Re: YJ transfer case rear output seal replacement? [Re: x89yjx] #791023 02/21/07 01:03 AM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler That's about it! Some folks lower the crank by loosening the caps or taking them off... I never do. It is real tight in there and not an easy job for a first timer. Just keep your wits about you and don't scratch the bearing surface. If there are a lot of miles on the engine I might replace the lower bearings while I was in there.. OR even the pump.. Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" /> professional bovine relocation specialist Re: YJ transfer case rear output seal replacement? [Re: BigJim] #791024 02/21/07 01:28 AM Joined: Feb 2007 Posts: 32 X x89yjx OP Getting the Wheeling Fever eh, 111,000mi. runs great but leaks everything.the front seal on the pully is seeping also. replacing the lower bearings is just a matter of popping the old ones out of each cap and putting in new ones right?once again, any tips or tricks....there is also a sludge screen on the pump that can be easily replaced correct? Re: YJ transfer case rear output seal replacement? [Re: x89yjx] #791025 02/21/07 02:50 AM Joined: Oct 2003 Posts: 7,768 Central Texas BigJim Web Wheeler Quote eh, 111,000mi. runs great but leaks everything.the front seal on the pully is seeping also. replacing the lower bearings is just a matter of popping the old ones out of each cap and putting in new ones right?once again, any tips or tricks....there is also a sludge screen on the pump that can be easily replaced correct? When replacing the lower bearings make sure the bearing-cap area is clean and dry! No oil between them. The screen is usually a pressure fit. When I remove one I always drill and tap the pump and install a bolt to hold it tight again. Making sure to not introduce filings into the pump. I don't trust second pressure fits. If you do replace the pump you should PRIME it before startup. 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