Defeo is an independent manufacturer & supplier of replacement parts for Allison brand transmissions.
Defeo is not affiliated with or sponsored by Allison Transmission, Inc. and is NOT an authorized Allison dealer or OEM manufacturer for Allison Transmissions Inc.
Defeo has a vast product line consisting of NEW aftermarket parts, genuine Allison parts, surplus parts; good used parts, refurbished parts, as well as new & refurbished 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.
DF = Defeo New Part, A = Allison New Part, R = Refurbished Part, U = Good Used Part, S = Surplus Allison Part