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"S/"T Series: Installation

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 1988 GMC Vandura Special, 1988 GMC Vandura, 1988 GMC Value Van, 1988 GMC Suburban, and 1988 GMC Safari. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean all old gasket material from transmission and transfer case mating surfaces. Position NEW gasket on transfer case with orientation tab at upper left bolt hole.
  2. Install transfer case, aligning splines of input shaft with transmission. Slide transfer case forward until seated against transmission. Install transfer case attaching bolts and tighten to specification. See TORQUE SPECIFICATIONS ("S/T" SERIES)  . Install rear crossmember.
  3. Attach shift lever and connect speed sensor electrical connector and vacuum harness at transfer case. Using reference marks made during removal, reinstall front and rear drive shafts. Refill transfer case. Install skid plate and lower vehicle. Connect negative battery cable. Road test vehicle.
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