Ring Pinion Speedo Speedo Years Models Tire or Wheel Sizes Gear Teeth Adapter Gear No 60 63 Ser 20 exc 4 WD 8 19 5 7 50 x 17 32 7 None 3760340 60 63 Ser 20 exc 4 WD 8 17 5 7 00 x 1 6 7 00 x 17 7 50 x 15 32 7 None 3760341 60 63 Ser 20 exc 4 WD 7 17 5 7 00 x 1 5 15 x 6 32 7 None 3760342 60 63 Ser 30 7 00 17 7 00 18 8 19 5 7 50 x 17 36 7 None 3760342 60 63 Ser 30 7 17 5 8 17 5 7 00 x 15 7 50 x 15 7 50 x 16 15 x 6 36 7 None 3760343 4 338 FITTING PLUG RETAINER SLEEVE SEAL Speedometer Driven Gear 38 47 COMM UTIL w 4 SPD w gear UQ O L 590106 1 65 54 55 1 Q TON lst Ser 2nd design 55 56 PASS CORVETTE 55 59 Ser 3 w 3 SPD exc H D 57 PASS CORVETTE exc P G 58 59 PASS w 4 SPD P G O D 58 59 CORVETTE 60 CORVETTE exc 4 SPD 60 PASS w P G O D 60 62 Ser 10 20 w 3 SPD P G exc H D 4 VVD 2 O L 3708147 1 70 58 PASS exc O D P G 59 60 PASS exc O D P G 4 SPD 60 CORVETTE w 4 SPD w gear 2 O L 3748533 1 70 54 55 TON w H T w gear 6 00 x 16 6 70 x 15 23 teeth 514865 l 1 90 54 56 Q TON w H T w gear 15 x 5 50 6 50 x 16 22 teeth 1344675 1 4 337 54 59 3 TON w H T exc D D w gear 7 00 x 17 7 50 x 17 15 teeth daub of brown and blue paint 3707624 1 2 80 54 58 H TON w H T exc D D w gear 15 54 55 TON D D w H T lst Ser 7 50 x 17 8 ply 55 58 TON D D w H T 2n d Ser 7 00 x 18 54 61 1 TON w H T 7 00 x 18 7 50 x 17 57 59 M TON D D w H T 7 50 x 17 15 x 5 5 60 61 D D w H T 7 00 x 17 daub of blue and green paint 16 teeth 3707625 1 2 95 Not required in this group See group 4 337 3707628 2 95 54 58 tj TON w H T exc D D w gear 6 50 x 16 54 55 D D w H T 1stSer 7 00 x 17 54 59 1 TON w H 1 7 00 x 17 8 ply 55 D D w H T 2nd Ser 7 00 x 17 7 50 x 17 57 59 TON D D w H T 7 00 x 17 57 59 M TON w H T exc D D 6 50 x 16 60 61 D D w H T 7 50 x 15 7 50 x 16 daub of blue and orange paint 17 teeth 3707626 1 2 80 54 55 M TON D D w H T lst Ser w gear 15 60 61 D D w H T 7 00 x 15 15 x 6 wheel daub of green and orange paini 18 teeth 3707627 1 2 80 61 63 PASS CORVETTE 63 Ser 10 20 w P G 3 SPD exc H D 1 O L 3775589 1 65 38 47 COMM UTIL w 4 SPD PLUG geazr 590104 1 35 60 4 1 WD 62 63 4 WD w 4 SPD PLUG fitting hole hex l 20 3718093 1 1 10 61 63 4 WD w 3 SPD PLUG fitting hole O D 3783874 1 65 55 59 Ser 3 w 3 SPD 2nd Ser exc H D 55 63 PASS CORVETTE 60 63 Ser 10 20 w P G 3 SPD exc H D RETAINER geor fitting 9 1 D 3708148 1 10 60 63 4 WD SLEEVE 2396891 I 1 45 55 62 ALL CORVETTE w 3 SPD exc H D 55 56 CORVETTE wVP G 57 62 PASS CORVETTE w 4 SPD 62 63 PASS SEAL gear fitting O ring 61 62 4 WD w 3 SPD hole plug 1 1 D 3708146 1 05 NOTE Also listed in tubeless tire section ot this group C 1 g3g t Motor Division General Motors Corporation