ACDelco Rear Axle Lubricant 32 oz — OEM GM 10-4091 (19300457), stable viscosity & wear protection

ACDelco GM Original Equipment 10-4091 is a 32 oz rear axle lubricant formulated to meet GM specifications for dependable gear protection and smooth differential performance.

Designed and tested to the strict standards of General Motors, this ACDelco rear axle lubricant delivers a ready-to-use 32-ounce bottle of OEM-grade fluid for rear differentials and axle assemblies. Packaged for easy handling and marked with model number 10-4091 (19300457), the product is made in the United States and intended as a direct-replacement maintenance fluid for compatible GM vehicles and many other applications that call for the specified rear axle lubricant performance.

What does this lubricant do for my rear axle?

This product provides a formulated film between metal components in the differential and axle gears to reduce friction and support long-term operation. It’s engineered to maintain consistent viscosity under load and protect internal components during normal driving conditions.

• OEM-formulated for GM gear and bearing compatibility
• Stable viscosity for reliable gear mesh and quiet operation
• Contains additives to help resist wear and corrosion
• Sold in a convenient 32 oz bottle for maintenance and top-ups

How do I use the 32 oz bottle for a rear axle service?

The bottle is sized for refill or top-up of many rear differentials; always consult your vehicle’s service manual for the correct fluid capacity and fill procedure. Use proper safety practices, drain old fluid, replace drain and fill plugs as needed, then add until the recommended level is reached.

• Check vehicle manual for required capacity and fluid spec
• Warm vehicle slightly to help old fluid drain cleanly
• Use a pump or funnel for clean transfer into the fill port
• Dispose of used fluid according to local regulations

Which vehicles and differentials is this compatible with?

ACDelco labels this as GM Original Equipment specification 10-4091 (19300457), making it appropriate for many GM rear axle applications that call for the same specification. It may also be suitable for other makes if their service specification matches; always verify cross-reference information before use.

• Direct fit for GM models specifying the 10-4091/19300457 spec
• Useful for classic and modern GM differentials when spec matches
• Check owner’s manual or parts catalog for cross-reference guidance
• Made in the United States to GM-tested quality standards

How does packaging and labeling help in workshop use?

The 32 oz bottle offers a compact solution for on-vehicle topping or small-capacity differentials, and the product labeling includes model numbers and origin details for easy inventory and audit. The package dimensions and weight are suitable for storage and shelf organization in service bays and home garages.

• Compact 9" x 4.4" x 2.5" bottle dimensions for convenient storage
• Clear model number (10-4091) and GM OEM reference (19300457)
• Item package weight listed for shipping and inventory planning
• Manufactured in the United States for traceability and compliance

Who is this for? This 32 oz ACDelco GM Original Equipment rear axle lubricant is aimed at professional technicians, independent repair shops, fleet maintenance teams, and do-it-yourself vehicle owners who require a GM-specified fluid for rear differentials. If your vehicle’s service schedule or parts manual calls for the 10-4091/19300457 specification, this ready-to-use bottle delivers an OEM-grade option for topping, small-capacity servicing, or keeping a workshop supply on hand.