OEM 2004 GMC Envoy Transfer Case Seal

2004 GMC Envoy Parts Questions & Experts Answers

• Q: How to replace the front output transfer case seal on 2004 GMC Envoy?

  A: The replacement of the front transfer case output shaft seal starts with draining transfer case fluid followed by removing the front propeller shaft after bending out all staked areas on the yoke flange nut. Bend out the stakes on the yoke flange nut using a suitable punch tool so you can loosen the yoke flange nut by placing it in the flange and pulley holding tool (J 8614-01). The installation process requires removal of the yoke flange nut along with its o-ring and front output yoke flange. Discard the used flange nut and o-ring after removing them. A flat-bladed screwdriver should be tapped gently along the boundaries of the front output shaft seal before using it to pry the seal free from the transfer case. The front output shaft seal installer (J 37212) together with a hammer allows you to install the new front output shaft seal properly into the transfer case. The installation process starts with attaching the yoke flange to the front output shaft followed by lubricating the new yoke flange o-ring seal using transfer case fluid. After this fitting the yoke flange and new nut are secured. Use the flange and pulley holding tool (J 8614-01) to clamp the yoke flange before torquing the yoke flange nut to 137 nm (1101 ft. Lbs.). As a conclusion install the front propeller shaft followed by filling the transfer case with fluid.