This is the Motorcraft XL19 rear axle additive RDU friction modifier used on TVR Ford and Lincoln applications. Check your owner's manual and/or the rear axle assembly if needed. Part number is XL-19. It is for Torque Vectoring RDU applications only. This is sold by the single 1.86-ounce bottle. Shipping options and cost is based on your zip code and will show the amount once placed in the shopping cart using the shipping estimator.
Rear-axle fluids guide chart on our Reference info page.