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GMC Truck
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1987
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R 3500 P/U 2WD L6-292 4.8L
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Repair and Diagnosis
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Specifications
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Mechanical Specifications
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Transmission and Drivetrain
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Manual Transmission/Transaxle
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Reverse Idler Gear
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Isuzu M-150 (77.5 mm) 4-Speed
Isuzu M-150 (77.5 mm) 4-Speed
Reverse gear to mainshaft nut
95 ft. lbs.