1996 Buick Roadmaster Owner's Manual - Page 241

How to Add Fluid Refer to the Maintenance Schedule to determine what kind of transmission fluid to use. See "Recommended Fluids and Lubricants"in the Index. Add fluid only after checking transmission fluid the HOT. (A COLDcheck is used only as a reference.) If the fluid level is low, add only enoughof the proper fluid to bring the level up to the HOT area for a hot check. It doesn't take much fluid, generally less than a pint (0.5 L). Don't overjikl. We recommend you use only fluid labeled DEXR0N'-III, because fluid with that label is made especiallyfor your automatic transmission. Damage caused by fluid other than DEXR0N'-III is not covered by your new vehicle warranty. 0 Rear Axle When to Check and Change Lubricant Refer to the Maintenance Schedule to determine how often to check the lubricant and when change it. See to "Scheduled Maintenance Services" theIndex. in How to Check Lubricant If the levelis below the bottom of the filler plug hole, you'll need to add some lubricant. Add enough lubricant to raise the level to bottom of the filler plug hole. the What to Use Standard Differential Use Axle Lubricant(GM Part No. 1052271) or SAE 80W-90 GL-5 gear lubricant. Limited-Slip Differential is To add lubricant when the level low, use Axle Lubricant (GM PartNo. 1052271). To completely refill after draining, add4 ounces (118 m )of Limited-Slip l Differential Lubricant Additive (GM Part 1052358). No. Then fill to the bottom of the filler plug hole with Axle Lubricant (GM Part No. 1052271). After adding fluid, recheck the fluid level as described under "How to Check." When the correct fluidlevel is obtained, push the dipstick backin all the way; then flip the handle down tolock the dipstick in place. 0 6-19.