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The following suffixes correspond to the types of parts on all Xcalliber documents: DF = Defeo New Part, A = Allison New Part, R = Refurbished Part/Transmission, U = Good Used Part, S = Surplus Allison Part/Transmission, GM = General Motors New Part, X = New Aftermarket Performance Part

Xcalliber is an independent manufacturer and supplier of replacement parts for Allison brand transmissions. XCALLIBER is not affiliated with, or sponsored by Allison Transmission, Inc. and is NOT an authorized Allison dealer or OEM manufacturer for Allison Transmission, Inc. XCALLIBER also offers a full line of refurbished Allison brand transmissions, performance parts and performance upgraded Allison transmissions, and is NOT in any way affiliated with, sponsored by, or otherwise endorsed by Allison Transmission, Inc. XCALLIBER has a vast product line consisting of NEW aftermarket made parts, refurbished Allison transmission parts, surplus Allison transmission parts, good used parts, and refurbished Allison transmissions. Part numbers are strictly used for identification purposes only, and in no way indicates a part is an OEM part unless specifically identified as such.