2013 Spicer/Dana DSP41, Truck Tractor, Tandem Cutoffs, Fits to: Peterbilt 388, (Used) 2013 Peterbilt 388, TANDEM CUTOFF, Make: Spicer, Model:DSP41, Ratio:3.90, Brake Type: AIr, Suspension type: Air, Hub Bolts: 10, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS), Ratio 3.90, Serial# Other, Casting# Other 1XPWDP9X9DD177702