Question about 1986 Oldsmobile Cutlass Supreme

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What kind of oil does the differential take? - 1986 Oldsmobile Cutlass Supreme

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75 /85/90 weight gear grease,,about 2 quarts and a /14 of a bottle,85/90 will be what you find mostly,and it is just fine.

Posted on May 13, 2010

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Use 80W90W

Posted on May 13, 2010

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90 or 120 weight gear oil

Posted on May 13, 2010

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Where do i put the differential gear oil


Front Differential Oil Change dd7e0eb.gif
  1. Before changing or inspecting oil, be sure to stop engine and lift vehicle horizontally.
  2. With vehicle lifted up, check leakage. If leakage exists, correct it. NOTE: Whenever vehicle is hoisted for any other service work than oil change, also be sure to check for oil leakage.
  3. Remove oil filler plug (2).
  4. Remove drain plug (1), and drain old oil.
  5. Apply sealant to thread of drain plug (1), and tighten it to specified torque.Tightening torque Differential oil drain plug a: 23 Nm (2.3 kg-m, 17.0 ft. lbs.)
  6. Pour new specified oil until oil level reaches bottom of oil filler plug hole (3) as shown in figure. NOTE:
    • Hypoid gear oil must be used for differential.
    • It is highly recommended to use API GL-5 80W-90 gear oil.
Differential oil specification: API GL-5 (For SAE classification, refer to viscosity chart [A] in figure.)

Differential oil capacity (Reference): 0.9 - 1.1 liters (1.9/1.6 - 2.3/1.9 US/Imp. pt.)

  1. Apply sealant to thread of level / filler plug, and then tighten it to specified torque. A: Sealant 99000-31260SUZUKI Bond No.1217G Tightening torque Differential oil level / filler plug b: 23 Nm (2.3 kg-m, 17.0 ft. lbs.)

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