All "S" Series: Installation
WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 1984 GMC Vandura Special, 1984 GMC Vandura, 1984 GMC Value Van, 1984 GMC Suburban, and 1984 GMC S15 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Reverse removal procedures to install transmission, noting the following: On 77 MM 4-speed, coat main drive gear bearing retainer and splined portion of transmission main drive gear with high temperature grease before installation.