1 SPEEDOMETER GEAR CHARTS l V 1 977 SPEED 0 GEAR USAGE CHART 1977 A CAR DRIVE DRIVEN TRANS GEAR GEAR SLEEVE ADAFT 2 56 305 350 M28 G GR 14 15 6261785 3987920 345215 2 56 305 350 M38 H B4 HR 15 6261786 3987919 345215 2 73 250 M15 All 6261785 3987921 345215 2 73 250 M38 exc I 178 15 6261782 3987919 345215 2 73 250 M38 H78 15 6261782 3987918 345215 2173 350 M38 G GR 14 81 15 6261785 3987921 345215 2 73 350 M38 H 81 HR 15 6261785 3987920 345215 2 73 350 M38 H78 14 6261785 3987920 345215 3950354 3 07 250 M15 FR7B 15 6261785 3987919 345215 3905497 3 07 250 M15 G Be GR78 15 6261785 3987921 345215 6273218 3 07 250 M38 FR78 15 6261782 3987922 345215 3 07 250 M38 G 84 GR 14 B4 15 6261782 3987920 345215 3 07 250 M38 H78 15 6261782 3987920 346215 3 07 350 M38 H HR 15 6261785 3987922 345215 3950354 1 3 07 360 M3B exc H 84 HR 15 6261785 3987921 345215 6273218 1977 SPEED 0 GEAR USAGE CHART 1977 B CAR DRIVE DRNEN TRANS TIRE GEAR GEAR ADAFT 1 2 56 350 305 All All 6261785 3987920 345215 2 73 305 350 All exc HR78 15 6261785 3987921 345215 1 2 73 305 350 All HR78 15 6261785 3987920 345215 2 73 250 All All 6261782 3987919 345215 1 3 07 350 M29 FR78 15 6261785 3987919 345215 3905497 3 07 350 M29 GR78 15 6261785 3987921 345215 6273218 3 07 350 M29 GR70 15 6261785 3987921 345215 6273218 3 07 350 M38 FR78 15 6261785 3987919 345215 3905497 1 3 07 350 M38 GR78 15 GR70 1 5 6261785 3987921 345215 6273218 1 3 07 350 M38 HR78 15 HR70 15 6261785 3987922 345215 3950354 3 07 250 M38 FR78 15 6261782 3987922 345215 3 07 250 M38 GR78 15 GR70 15 6261782 3987921 345215 3 07 250 M38 HR70 15 6261782 3987920 345215 3950354 GM PARTS DIVISION GENERAL MOTORS CORPORAT 0N CHEVROLET 10 REV 9 18 41 c 4 000 GROUP