1996 Pontiac Firebird Owner's Manual - Page 267

Rear Axle When to Check and Change Lubricant Refer to the Maintenance'Schedule to determine how often to check the lubricant and when to change it. See "Periodic Maintenance Inspections" in the Index. Engine Coolant The cooling system in your vehicle is filled with new DEX-COOL TM (orange-colored, silicate-free) engine coolant. This coolant is designed to remain in your vehicle for 5 years or 100,000 miles (166 000 km), whichever occurs first. The following explains your cooling system and how to add coolant when it is low. If you have a problem with engine overheating or if you need to add coolant to your radiator, see "Engine Overheating" in the Index. A 50/50 mixture of water and the proper coolant for your Pontiac will: 0 0 0 How to Check Lubricant If the level is below the bottom of the filler plug hole, you'll need to add some lubricant..Add enough lubricant to raise the level to the bottom of the filler plug hole. What to Use Standard Differential Use Axle Lubricant (GM Part No. 12345977) or SAE 8OW-90 GL-5 gear lubricant. / Give freezing protection down to -34 OF (-37 C ) . O Give boiling protection up to 265 O ( 129°C). F Protect against rust and corrosion. Limited-Slip Differential To add lubricant when the level is low, use Axle Lubricant (GM P r No. 12345977).To completely refill at after draining, add 2 ounces (59 ml) of Limited-Slip Differential Lubricant Additive (GM P r No. 1052358). at Then fill to the bottom of the filler plug hole with Axle Lubricant (GM,PartNo. 12345977). a Help keep the proper engine temperature. a Let the warning lights and gages work as they should. .: . < .( , . . , 6-26