GM Service Manual Online
For 1990-2009 cars only

    Object Number: 723186  Size: SH

    Notice: Various transmission components require heating to 150°C (300°F) for 30 minutes for proper installation. Overheating may damage the components. Under-heating the components may cause hard installation, which may damage the components.

    Important: Certain transmission components require preheating to 150°C (300°F). In order to preheat the components, use an electric oven. It is recommended to purchase a roaster/oven style locally. The oven should have a temperature setting thermostat.

  1. Preheat the countershaft intermediate bearing and the countershaft front bearing for 30 minutes to 150°C (300°F) in an electric oven.
  2. Caution: When handling parts that have been preheated for installation purposes, always wear leather welding gloves with a minimum amount of handling time. Failure to wear leather gloves may result in severe skin burns or personal injury.

  3. Wearing protective gloves, install the preheated countershaft intermediate case bearing on the countershaft. Rotate the bearing in order to seat it fully and squarely.

  4. Object Number: 723187  Size: SH

    Caution: When handling parts that have been preheated for installation purposes, always wear leather welding gloves with a minimum amount of handling time. Failure to wear leather gloves may result in severe skin burns or personal injury.

  5. Wearing protective gloves, install the preheated countershaft front bearing on the countershaft. Rotate the bearing in order to seat it fully and squarely.
  6. Allow the bearings to cool before further installation of the countershaft.