C 2500 Truck 2WD V8-5.7L VIN R (1997)
5. Pinion shaft (B).
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Remove the shaft from the case on vehicles without a locking differential.
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With a locking differential, remove the shaft (B) part way, and rotate the case until the pinion shaft touches the housing.
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Use a screwdriver or similar tool to enter the case and rotate the lock until it aligns with the thrust block.
6. Lock.
