Ring Pinion Speedo Speedo Years Models Tire or Wheel Sizes Gear Teeth Adapter Gear No 55 5 58 ALL w 2 SPD 2ncl Ser 7 50 1 20 8 24c5nd None 3689121 56 58 1 TON exc 2 SPD 7 x 22 5 8 x 19 5 37 6 None 3689121 j 56 58 2 TON w hvy duty 8 x 22 5 9 x 22 5 36 5 1565814 3689121 56 58 2 TON w hvy duty exc D D 10 1 22 5 36 5 None 3689121 48 55 ij TON lst Ser exc D D l5 6 and 8 ply 36 7 None 3689178 55 58 M TON 2nd Ser exc D D l5 6 50 1 16 32 7 None 3689178 55 58 EM TON 2nd Ser exc D D 7 501 17 32 7 1565813 3689178 455 55 f TON D D lst Ser 7 50 17 8 ply 36 7 None 3689178 48 55 M TON D D lst Ser 7 00 1 7 6 and 8 ply 36 7 1565814 3689178 55 58 D D 2nd Ser 7 00 1 17 7 50 x 17 7 00 zu 1 8 36 7 None 3689178 48 55 1 TON lst Ser 7 00 1 7 6 and 8 ply 36 7 1565814 3689178 48 55 1 TON lst Ser 7 50 1 7 8 ply 7 00 18 8 ply 36 7 None 3689178 55 58 1 TON 2nd Ser 7 00 1 17 8 ply 7 50 x 17 8 ply 7 00 x 1 8 8 ply 36 7 None 3689178 48 55 1 TON 1stSer 6 50 20 6 and 8 ply 7 00 20 8 md 10 ply 7 38 axle ratio 38 7 None 3689178 48 55 1 TON lst Ser 7 50 20 8 and 10 ply 38 7 1565812 3689178 55 1 TON w 2 SPD 2nd Ser 7 50 1 20 8 or 10 ply 7 94 and 3714874 3689178 5 83 48 55 ALL wo 2 SPD lst Ser 8 25 20 10 and 12 ply 9 00 120 10 ply 8 10 and None 3689178 6 13 l 48 55 2 TON lst Ser 8 25 20 10 and 12 ply 9 00 20 10 ply 37 6 None 3689178 55 2 TON w 2 SPD 2nd Ser 7 50 ll 20 8 or 10 ply 8 25 1 20 10 or 7 94 andl 3714874 3689178 12 ply 9 00 x 20 10 ply 5 83 55 58 2 TON w 2 SPD 2nd Ser 9 00 1 20 10 00 x 20 8 72 and None 3689178 6 40 55 56 2 TON wjnvy duty 2nd Ser 8 25 1 20 56 58 1 TON exc 2 SPD 8 25 x 20 10 00 x 20 57 58 2 TON wjreg procl 8 25 x 20 37 6 1565814 3689178 55 56 2 TON w hvy duty 2nd Ser 9 00 1 20 10 ply 57 58 2 TON w reg prod 9 00 xi 20 10 00 x 20 37 6 None 3689178 56 58 TON exc D D 7 x 17 5 32 7 None 3689178 56 58 Li TON exc D D 8 x 17 5 32 7 1565812 3689178 56 58 M TON exc D D 8 1 19 5 32 7 1565813 3689178 56 58 D D 1 TON 81 19 5 36 7 None 3689178 56 1 TON w 2 SPD 8 x 22 5 7 95 cmd None 3689178 5 83 57 58 1 TON w 2 SPD 8 x 22 5 8 72 andl None 3689179 1 6 40 56 58 2 TON exc 2 SPD D D 9 x 22 5 10 1 22 5 37 6 None 3689178 56 2 TON w 2 SPD 9 1 22 5 10 x 22 5 7 95 and 1565812 3689178 5 83 56 58 2 TON w 2 SPD exc D D 10 1 212 5 8 72 and None 3689178 56 58 1 TON w 2 SPD 10 00 x 210 6 40 None 3689178 48 55 ALL w 2 SPD lst Ser 7 50 20 8 10 and None 3689179 6 13 48 55 ALL w 2 SPD lst Ser 1 0 00 18 12 ply 8 10 and 1565812 3689179 6 13 48 55 2 TON lst Ser 53 55 1 TON lst Ser 7 50 20 8 25 20 37 6 None 3689179 55 58 1 TON 2nd Ser exc 2 SPD 55 2 TON w hvy duty 2ncl Ser 7 50 20 37 6 None 3689179 55 58 2 TON w reg prod 2nd Ser 7 50 1 20 37 6 None 3689179 I 55 58 ALL w 2 SPD 2nd Ser 8 25 1 20 8 72 and None 3689179 6 40 5658 1 TON 8 x 1 7 5 8 ply 36 7 None 3689179 56 58 1 TON exc 2 SPD El 1 22 5 37 6 None 3689179 56 58 2 TON exc 2 SPD 8 1 22 5 37 6 None 3689179 56 58 2 TON w 2 SPD 8 x 22 5 9 x 22 5 8 72 and None 3689179 6 40 54 55 TON lst Ser 6 001 16 6 ply 55 58 TON 2nd Sen 15 6 50 x 16 6 ply 39 10 None 3707598 56 58 TON 7 1 17 5 39 10 1565812 3707598 58 1 TON 8 x 17 5 8 ply 58 D D 7 x 17 5 8 x 17 5 6 and 8 ply 36 7 None 3689179 58 TON 6 70 15 6 50 16 6 ply 37 10 None 3752392 58 TON 7 00 17 5 8 00 17 5 37 10 1563871 3752390 4 337 482 REVISED JULY 1 1958