1995 Pontiac Firebird Owner's Manual - Page 262

How to Check The proper fluid should be added if the level is below the "STEP" mark on the reservoir.See the instructions on the reservoir cap. What toUse Standard Differential Use Axle Lubricant (GM PartNo. 1052271) or S A E 8OW-90 GL-5 gear lubricant. Rear Axle When to Check and Change Lubricant RefertotheMaintenanceSchedule to determine how often to check the lubricant and when to change it. See "PeriodicMaintenanceInspections"intheIndex.add Limited-Slir, Differential 1 How Check to Lubricant To add lubricant when the level is low, Axle use Lubricant (GM P r No. 1052271) or SAE SOW-90 at GL-5 gear lubricant. To completely refill after draining, 4 ounces (118 ml) of Limited-Slip Differential Lubricant Additive (GM Part No. 1052358).Then fill to the bottom of the filler plug hole with Axle Lubricant If the level is below the bottom of the filler plug hole, (GM Part you'll need to add some lubricant. Add enough lubricant lubricant. to raise the level to the bottom filler plug hole. of the No. 12345977) or SAE SOW-90 GL-5 gear 6-29