2012 Spicer/Dana DSP40, Truck Tractor, Tandem Cutoffs, Fits to: Peterbilt 365, (Used) 2012 Peterbilt 365, TANDEM CUTOFF- Make: Spicer, Model: DSP40, Ratio: 3.55, Hub Bolts: 10, Brake Type: Air Wedge, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PART) 929 W PULASKI HWY ELKTON, MD 21921, Ratio 3.55, Serial# other, Casting# other 1XPSD79X2CD146868