A22. We recommend you change the differential oil according to your vehicle manufacturer's specifications and treat with Auburn limited-slip additive (part numer #504102).
A23. Non-synthetic 80w90 GL-5 oil treated with Auburn Gear friction additive, part #504102 (also known as a friction modifier). See Catalog page 32. Three (3) ounces of additive will treat one quart of oil. GM or Ford limited-slip additive may be used. We do not recommend synthetic oil. Auburn limited-slip additive is packed in every box with the differential.
A24. New units—not rebuilt—are provided at a minimal cost for qualified replacements under the D-REX program. With the best warranty in the industry, there is no need to repair the Auburn Gear limited-slip differential. Please see the the D-REX new replacement program and limited warranty on pages 33 and 34.
A25. Auburn Gear limited-slip springs will not weaken. The springs are not subject to cyclic compression/expansion, which can cause load loss. However, the clutch capacity can be reduced due to wear or damage from misuse.
A26. As with all performance products, the application and driver skills dictate the life of the product. Long life can be expected with all Auburn products when operated properly. Forcing one wheel to spin with respect to the other will greatly degrade the life of the differential.
A27. Auburn Gear differentials, because of the precision design and machining, cannot be rebuilt. Under the D-REX Program, a NEW unit can be purchased for about the price of a competitor’s clutch pack. The D-REX program covers four (4) years from the date code or four (4) years from original purchase receipt. See page 33 in the catalog.