1994 Chevrolet Corvette Owner's Manual - Page 189

Service and Appearance Care What to Use: To add lubricant when the level is low, use Axle Lubricant (GM Part 12345977) No. or SAE 8OW-90 GL-5 gear lubricant. To completely refill after draining, add 4 ounces (1 18 ml)Limited-Slip of Differential Lubricant Additive (GM Part No. 1052358). Then fill to the bottom of the filler plug hole with Axle Lubricant (GM Part No. 12345977) or SAE 8OW-90 GL-5 gear lubricant. Remove the nut on the outboard side of the unit. Then loosen the front and inboard nuts. For the LT5 engine, loosen the two inboard nuts. Move theECM unit to either side. Fluid should be added if the fluid level is at or below the "ADD" mark on the reservoir. There are additional instructions on the reservoir cap. When returning the ECM to its proper position, make sure the bolts are aligned with the slots in the bracket.Then gently push down on the unit. Whenreplacing the unit, be careful not to over-tighten the nuts -just tighten them until theyare snug. Rear Axle When to Check Lubricant Refer to the Maintenance Schedule to determine how often to check the lubricant. See "Periodic Maintenance Inspections" in the Index. Engine Coolant The following explains your cooling system and how to add coolant when it is low. If you have a problem with if engine overheating or you need to add coolant to your highfill reservoir, see "Engine Overheating" in the Index. The proper coolant for your Corvette will: 0 Give freezing protection down to -34°F (-37°C). 0 Give boiling protectionup to 262°F (128°C). 0 Protect against rust and corrosion. 0 Help keep the proper engine temperature. 0 Let the warning lights work as they should. How to Check Lubricant If the level is below the bottom the of filler plug hole, you'll need to add some lubricant. Add enough lubricant to raise the level to the bottom of thefiller plug hole. .. * 188