Series Pinion Tire Size A Year Mum mm R Gear 1 50 x 20 8 x 22 5 9 00 x 20 E 10 00x 20 56 59 5 6 7 8 10F P T 5 136 3756926 3756926 3756926 3756924 3756926 3756924 I 56 59 5 6 7 8 9 10 exc TDM P T 6 43 3756926 3756926 3756926 3756924 3756926 3756922 3756924 3756922 56 59 9 10 exc TDM P T 6 46 3756926 3756926 3756926 3756924 3756926 3756924 I 62 66 60 DIESEL 6 135 exc Emerg 6 J37 I Air Brake 5 SPD 8 339 2280103 2280103 22280103 2280103 2280103 2280103 62 TDM P T 5 SPD I w 4 SPD I I I Aux Trans 6 43 3816134 3816134 3816134 3816134 3816134 3816134 I3816134 I 62 66 80 I 68 60 427 exc I Aux Trans 5 SPD 7 39 2232670 2232670 12232670 2232670 2232670 2232670 2232670 I 2232670 I 64 66 TDM DIESEL 5 SPD w 4 I I SPD Aux I I Trans 2242559 2242559 2242559 2242559 2242559 2242559 2242559 I 2242559 I 62 66 80 Fuller I I I 8 SPD 3821556 3821556 3821556 38121556 3821556 3821556 I3821556 I 3821556 I 67 ALL 2431617 2431617 2431617 2431617 2431617 2431617 2431617 I2431617 NOTE AXLE RATIO RING GEAFI PINION I gg Adap gr1565814 I Use Adamm 1584275 37 6 6 17 ruse Adapter 1565812 gum Adapter 1585657 4Use Adapter 1584277 genes 5 and 6 0nIy Use Adapter 3714874 1 1 2 TON SPEEDOMETER GEAR NUMBER CHART 2 SPEED AXLE w 4 SPD TRANSMISSION See Nota Tire Size Pinion A 9 x 22 5 10 x 22 5 Year R Gear 7 50 x 20 8 x 22 5 8 25 x 20 9 00 x 20 10 00 x 20 55 56 6 35 36891 78 36891 78 56 58 5 32 3689178 57 58 5 32 3689179 5 36 59 6 43 3760347 3760347 60 62 5 32 3760345 3760345 3760344 3760344 3760344 63 66 5 32 38391 14 38391 I 4 3839114 3839117 38391 17 63 66 5 36 3760347 3760347 3760346 3760346 1971 CHEVROLEET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 318 j REV 6 71 4 71 4 337 4 337