SPEEDOMETER GEAR CHARTS TP204 1977 SPEEDOMETER GEAR CHART J G 1 2 3 w 3 SPD CODE DRIVEN GEARS SLEEVE ASM CODE ADAPTER A 39879IB IBT 345215 F 3915667 B 398 I9I9 I9T 345215 G 3950354 C 3987920 20T 345215 H 3950352 D 3987921 21T 345215 J 3905497 E 3987922 22T 345215 3 07 3 40 3 73 4 10 4 56 DRIVE GEAR DRIVE GEAR DRIVE GEAR DRIVE GEAR DRIVE GEAR V TIRE SIZE 8261794 6281794 8281794 626I794 8261794 DrIv n Ad I r Dvivan Adavur Driun Adautar D iv n Adapur Drivsn Adupuv 1 E7S 15 B D 8 H I F7S I5 B D E G F7B 15 OOR B D E G I G 78 I6 A G D E G G IE 15 OOR A C E GR78 I5 B D E G C7B I5 A G D E G 178 15 C E J78 15 OOR B G D G JR78 I5 C E A 8 0046 5 E B E H 8 00 16 5 OOR D G B I E H J 8 75 16 5 D E F D H 8 7548 5 OOR D E F D H WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION LT TRUCK 51 4 000 GROUP mo s REV 2 83