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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Automatic Transmission - 6L50/6L80/6L90 - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - On Vehicle >> Transmission Mount Inspection

Transmission Mount Inspection

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: In order to avoid oil pan damage and possible engine failure, insert a block of wood that spans the width of the oil pan bottom between the oil pan and the jack support.
  1. Raise the transmission/transaxle in order to remove the weight from the transmission/transaxle mount and create slight tension in the rubber.
  2. Observe the transmission/transaxle mount while raising the transmission/transaxle. Replace the transmission/transaxle mount if the transmission/transaxle mount exhibits any of the following conditions:
      IMPORTANT: Black paint on the rubber will crack with time, this does no constitute a failure.
    • The hard rubber surface is covered with heat check cracks.
    • The rubber is separated from the metal plate of the transmission/transaxle mount.
    • The rubber is split through the center of the transmission/transaxle mount.
  3. If there is movement between the metal plate of the transmission/transaxle mount and its attaching points, lower the transmission/transaxle on the transmission/transaxle mount. Tighten the bolts or nuts attaching the transmission/transaxle mount to the frame or transmission/transaxle mount bracket.
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