BASIC RPO INDEX l RPO DESCRIPTION RPO DESCRIPTION GWA Seals Oil Rear Axle Chicago Rawhide H75 Rear Axle A Eaton 18221 Two Speed 22 000 Lb G WN Rear Springs Tapered Leaf 34 000 Lb Capacity Capacity GYB Axle No Spin Diflerential Rear Unit H82 Rear Axle A Eaton 19201 Two Speed 23 000 Lb GVH Rear Springs Aux 4 000 Lb Mult Leaf 1482 28492 Capacity GVJ Rear Suspension Radius Rod Leel 18 000 Lb Capacity H89 Rear Axle Eaton 19221 Two Speed 23 000 Lb GKI Process Option Glider Kit Capacity GN5 Rear Suspension Reyco 101 38 000 Lb Capacity H94 Rear Axle A GMC H170 Single Speed 17 000 Lb G05 Rear Suspension Hendrickson RSA 380 Capacity w 50 Beam H95 Rear Axle A GMC H150 Single Speed 15 000 Lb GR1 Rear Suspension A Hendrickson UE 340 34 000 Lb Capacity w Ru Bushing 50 Beam H96 Rear Axle A GM 34 000 Lb Cap Single Speed GR2 Rear Suspension Hendrickson RUE 340 JL4 Brake System A Dual 1973 only GR4 Reyco 101 Suspension Lightweight Installation JL8 Brake Wheel Lock Control A Hyd V GUH Rear Suspension Reyco 101 38 000 Lb Capacity JR6 Moisture Iniector A Air Brake System Seal Co S300 GUK Rear Suspension Reyco 101A 34 000 Lb Capacity JNX Valve Tractor Parking Brake Control GVB Rear Axle No Spin JPO Brakes A Tank Air Dryer BW Guard System G40 Plug Rear Axle Magnetic Drain JPW Brake A Parking HY Park Hyd Spring Parking Brake G41 Plug Rear Axle Magnetic Filler JPV Brake System Alter Cooler G42 Rear Suspension Reryco 101 JOX Brake Increased Vertical CG WB Ratio G43 Rear Suspension GMC Air JUW Brake Chambers Rear Anchorlok G52 Rear Springs A 15 000 Lb Capacity JXM Brake Hose Tenna A Berg Flex A A Stick G54 Rear Springs A 18 500 Lb hpacity 3 JXS U lolnt A Spicer 1810 Series G55 Rear Springs 17 500 Lb Capacity JXT Brake System A Trac Pac G56 Rear Spring 20 800 Lb Capacity 3 JYU Brake Hose Semi Trailer 12 ft coiled cord G58 Rear Springs 23 000 Lb Capacity Parker Hann G59 Rear Spring 39 000 Lb Capacity JYD Brakes S Cam Type 16 5 x 5 Fri G60 Rear Springs Auxiliary JVJ Brake Indicator A Light 81 Buzzer Low Vac or G68 Shock Absorber Rear Air Presure G77 Rear Suspension Hendrickson RT380 JVQ Brake Hose Semi Trailer Synflex 12 ft coiled G78 Rear Suspension RU340 34 000 Lb Capacity JYR Brake Wheel Lock Control System A Eaton G79 Rear Suspension Hendrickson RT340 JYT Brake Equipment A FMVSS 121 A Delete G86 Rear Axle No Spin JYV Brake Control A Full Trailer G98 Seals Rear Axle Oil Slemco JM3 Brakes A Front Disc HRG Rear Axle Rockwell SOHP Single Speed JM7 Brakes Dual A Hyd Delco Hi Performance HR2 Rear Axle Shift Motor Electric T150 JN1 Drums A Brake Centrlfuse HUA Rear Axle GMC T185 2 Speed 18 500 Lb Capacity JS4 Brake Hose Seml Trai er Parker Hannifin HWE Rear Axle Eaton DS380 Single Spd 38 000 Lb Cap 12 ft Coiled HO7 Rear Axle A H135 Single Speed 13 500 Lb Capacity JO1 Rear Axle GMC T150 Two Speed 15 000 Lb H30 Rear Axle Rockwell R170 Single Speed 23 000 Lb Capacity Capacity J09 Rear Axle GMC T170 Two Spd 17 000 Lb Cap liao near Axle Rockwell SLHD Single speea 34 000 J63 Brake A Parking Salina L ed S Gam HD Lb Capacity J66 Rear Brakes 15 x 5 H45 Rear Axle Rockwell SOHD Single speed 38 000 J67 Brakes A Rear 15 x 5 Kelsey Hayes Lb Capacity w Alumin Features J68 Brakes A Front Rear S Cam Type H46 Rear Axle Rockwell SOHD Single Speed 38 000 Lb J69 Brake A Parking Spring Loaded S Cam Type Capacity J70 Brake Equipment Booster H52 Rear Axle Rockwell SSHD Single Speed 44 000 Lb J75 Brake Emergency Air Gasoline Models Capacity J78 Moisture Ejector A Air Brake System H55 Rear Axle Eaton 34DS Single Speed 34 000 Lb J80 Vacuum Reserve Tank A Hydraulic Power Brake Capacity J81 Gage A Vacuum Reserve Tank Ms7 near Axle eaten 17101 Single spe 1s 500 Lo cap JB2 Avwmaric Limiwvu V lv A Fr Br k use near Axle eaten 17201 Two spa 18 500 Le Cap 183 B A I Ai Pr w l di r H60 Rur Axle Eaton 19121 Single Speed 23 000 Lb J85 Moisture Ejector A Air Brake System BAW DV2 Capacity J91 Brake Control A Trailer H63 Rear Axle Eaton 17121 Single Speed 18 500 Lb KOV Element Air Cleaner Donaldson Duraliff 11 Capacity KPC Lines oil Statoflex 213 H64 Rear Axle A Eaton 23121 Single Speed 23 000 Lb KPH Air Cleaner 48 Tube Farr Slim Line ggpagjgy KPS Engine Oil Cooler in Radiator H65 Rear Axle Eaton 23221 Single Speed 23 000 Lb KOL Air Cleaner Donaldson EBA 11 Capacity KOW Air Cleaner Donaldson Pre Cleaner H72 Rear Axle Eaton 17221 Two Speed 18 500 Lb KRW Lines A Radiator Gates Silicone capacity KOV Throttle A Hand Locking Type Vernier H74 Rear Axle Eaton 18121 Single Speed 22 000 Lb KRA Engine Governor A 3800 RPM Capacity KRR Lines A Oil Parker Hannefin SS 25 23