Eng Make: PACCAR, Eng Model: PX-7 325 HP, Trans Make: ALLISON, Trans Model: RDS 3000, Speeds: 6 SPEED, FA Make: MERITOR, FA Model: MFS10, FA Weight: 10,000, RA Make: MERITOR, RA Model: MS21-14X, RA Weight: 21,000, Front Tires: 11R22.5, Rear Tires: 11R22.5, FR Susp: MONO-LEAF SPRING, RR Susp: PB AIR TRAC, WB: 187", Ratio: 4.88, Fuel Tank: 50 GAL LH, Stellar slider 20-s 36-54 manual adjustable hook height designed for 120" ca chassis. 1 hot shift PTO for Allison 3000 30k combo hitch 1 36x18x18 toolbox