GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Classic - 4WD 🢒 Transmission/Transaxle 🢒 Manual Transmission - NV 4500 🢒 Shift Shaft and Shift Fork Cleaning and Inspection
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Object Number: 789440 Size: SH

Important: The shift rails and the shift forks are not serviceable. The shift cover can be disassembled for inspect. The shift fork interlock pins, roll pins, and the shift bar housing expansion plugs are serviceable.

  • Remove the old sealant from the shift cover.
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  • Clean all the parts in a suitable cleaning solvent. Air dry the parts.
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  • Inspect the shift shafts for wear or scoring.
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  • Inspect the shift shaft forks for wear through the hardened surface, scoring, or distortion. The shift fork pads on the 5th/Reverse shift fork are serviceable.
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  • Inspect the shift fork, the bar poppet plungers and the springs for wear or distortion.
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  • Inspect the shift shaft socket assembly components for wear or distortion.
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  • Replace the shift cover if there is excessive wear to the shift forks, shift shafts, or to the shift shaft sockets.