This is the rear axle lubricant used on many heavy duty Ford applications. Check your owner's manual and/or the rear axle assembly for the tag stating use of this fluid. Part number is XY-75w140-QL. This is sold by the quart. There is a limit of 20 quarts per order due to shipping limitions. Shipping is via FedEx Ground Home Delivery ONLY based on your zip code and will show the amount in checkout.