Dynaflow Transmission - At 25,000 mile intervals the oil pan and torque converter should be completely drained and re-filled with fresh oil. Transmission MUST NOT BE FLUSHED when oil is changed. Use Special Buick Oil for Dynaflow Drive or any Automatic Transmission Fluid, Type A, which has an AQ-ATF identification number embossed in lid of container.

Put in 3 quarts of specified oil. Whit engine idling in Parking, complete the refilling to bring oil level to 1 3/4" below "FULL" mark on gauge rod. When transmission oil is warmed up, the oil level should then be at "FULL" mark on gauge rod.

Rear Wheel Bearings - Rear wheel bearings need not be lubricated more often than 20,000 miles. Whenever rear brakes are relined, or axle shafts are removed for other work it is advisable to inspect rear wheel bearings and oil seals. Replace seals if leaking or worn. Fill rear wheel bearings and space between oil seals with wheel bearing lubricant. Coat leather edges of seals with lubricant before installation of axle shaft.