63 66 Ser 10 vv H D 6 00 16 6 50 16 6 70 15 700 15 7 10 15 7 50 15 7 17 5 8 17 5 7 75 x 15 8 15 15 43 14 1565813 3752390 63 66 Ser 20 vv l l D 7 00 x 17 tires 32 7 1565812 37603471 63 65 Ser 20 D D vv HD 7 10 x 15 6 50 16 36 7 1565812 3760342 63 65 Ser 30 ID D vv I I D 6 50 16 7 00 18 7 50 16 8 19 5 7 50 17 7 17 5 3576 None 3760343 65 66 Ser 20 vv H D 7 00 x 16 7 50 x 16 7 50 x 17 37 9 None 3760340 65 66 Ser 10 vv l l D 6 50 x 16 7 00 x 15 7 00 x 17 7 x 17 5 41 11 None 3752390 65 66 Ser 20 vv H D 6 50 x 16 7 00 x 15 7 x 17 5 37 9 None 3760341 Commercial and Utility Trucks equipped with 4 Speed Transmission Ring Pinion Speedo Speedo Year Models Tires or Wheel Sizes Gear Teeth Adapter Gear No 38 47 S T V VV Y M OR OS 0 V OY PJ PK PL OJ OK OL 6 00 207776 and 8 ply 30 x 5 7 6 and 8 ply 37 6 1565814 603074 38 47 8 T V V Y IVI OR 08 O1 V OY PJ PK PL OJ OK OL 6 50 20 776 ply 7 00720 7777 8 ply 32 x 6 78 and 10 ply 32 x 7710 ply 37 6 None 603074 38 47 S l V Y M OR OS O V OY PJ PK PL OJ OK Ol 7 50 207 8 ply 37 6 1565812 1565813 603074 39 42 V Y M vv 2 Spd 8 25 20710 ply 8 22 and 6 17 1565812 606431 603074 48 53 I y Ton 5 50 1576 and 8 ply 6 007 16777776 ply 6 5O 71676 ply 37 9 None 3689223 48 55 31 Ton lst Ser exc D D 7 00 1776 and 8 ply 3277 None 3689223 48 55 3 4 Ton lst Ser exc D D 7 50 17 778 ply 3277 1565812 3689223 48 55 3 1 Ton lst Ser exc FR 5 50 15 776 and 8 ply 30 7 None 3689121 55 58 3 1 Ton 2ncl Ser exc D D 7 00 17 32 7 1583876 3689121 48 55 ll y Ton lst Ser 7 50 207 8 anti 10 ply 3776 1565812 3689121 48 55 ll 7 Ton lst Ser 10 00 18712 ply 3776 1565813 3689121 48 55 3 1 Ton lst Sor exc D D 15 6 and 8 ply 3677 None 3689178 55 58 3 1 Ton 2nd Sor exc D D 15 6 50 x 16 3277 None 3689178 55 2 Ton vv 2 Spd 1stSer 7 50 20710 ply 8 25 2077 10 or 12 ply 8 86 and 6 7 None 3689121 55 58 3 4 Ton 2ncl Ser exc D D 7 50 x 17 3277 1565813 3689178 48 55 3 1 Ton D D 1st Ser 7 50 17778 ply 36 7 None 3689178 48 55 3 1 Ton D D 1st Set 7 00 177776 and 8 ply 36 7 1565814 3689178 55758 D D 2nd Ser 7 00 x 17 7 50 x 17 7 00 x 18 3677 None 3689178 48 55 1 Ton 1stSer 7 00717776 and 8 ply 3677 1565814 3689178 48 55 1 Ton lst Ser 7 50 1777 8 ply 7 00 1878 ply 3677 None 3689178 55 58 1 Ton l2n l Ser 7 00 17778 ply 7 50 x 17778 ply 7 00 x 1877 8 ply 36 7 None 3689178 48 55 1I y Ton l1stSer 6 50 20776 and 8 ply 7 007 20778 and 10 ply 7 38 axle ratio 3877 None 3689178 48 55 ll 2 Ton 1stSer 7 50 2078 and 10 ply 38 7 1565812 3689178 48 55 All vv 2 Spd lst Ser 8 25 20 7710 and 12 ply 9 00 20710 ply 8 10 and 6 13 None 3689178 48 55 2 Ton lst Ser 8 25 2077 10 and 12 ply 9 00 207710 ply 37 6 None 3689178 56 58 3 4 Ton exc D D 7 x 17 5 32 7 None 3689178 56 58 3 A Ton exc DoD 8 x 17 5 3277 1565812 3689178 56 58 3 11011 oxo D D 8 x 19 5 3277 1565813 3689178 56 58 D D 1 Ton 8 x 19 5 36 7 None 3689178 48 55 Il W 2 Sptl lst Ser 7 50720 8 10 and 613 None 3689179 48 55 All yy 2 Spd lst Ser 10 00 18712 ply 8 10 and 6 13 1565812 3689179 48 T5 2Ton 1stSer 53 55 ll y Ton lst Ser 7 50 20 8 25 20 37 6 None 3689179 56 58 1 Ton 8 17 578 ply 36 7 None 3689179 54 55 l 2 Ton lst Ser 6 00 x 16 776 ply 55 58 I 2 Ton 2n 1 Ser 15 6 50 x 16 76 ply 39 10 None 3707598 56 58 12 lon 7 x 17 5 39 10 1565812 3707598 57 58 All vv 4 VD 7 x 17 5 6 6 x 17 5 8 x 19 5 32 7 1565812 1565813 3745935 1969 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORAT ON i 4 337 4 337 P 4 110 REV 7 1 69