SPEEDOMETER GEAR CHARTS 1978 srzzno cnn usAc5 CHART C 1 2 3 WI3 SPEED 45 GEAR GEAR ADAPTER 626I794 3987918 I8 Brown 345215 H 3950354 9744 Y 3987921 21 Red 346215 I 3950348 1 2020 X 3987920 20 Blue 345215 J 3925671 I 0500 U 3987919 19 Natural 345215 K 3925673 1 1111 V 3987922 22 Silver 345215 L 3925669 9444 W M 3905497 8000 T N 3950352 8242 C 1978 SPEE 0 GEAR USAGE CHART C 1 Z 3 wI3 SPEED Q A 6 o 0 V G78 15 cms 15 A QQ G78 1500R LR60 15 H78 15 H78 1500R 3 07 M15 L10 15 1 7a 1500R 1 1112 15 A l I 7 00 15 HIE J 7 00 16 1 00 150011 10 00 I5 MC1 EIH I 5 50 16 A IIIH GR78 15 A IIE G78 1500R LR50 15 1 111515 1 H78 15 H78 1500R 1 15 15 QIHIII L7 500R 6 50 16 7 00 15 m 7 00 16 7 00 150011 10 00 15 A II II G10 15 HK L GR78 15 A HEI G78 150cR LR60 15 A H78 15 H78 1500R L78 15 L78 1500R 7 00 15 6 50 16 8 75 16 5 5 75 15 50011 3 73 1 1110 15 lg L 1 00 10 M15 MC XIII 7 00 1600R 9 5046 5 9 50 16 500R 10 00 15 I II 7 50 15 QIEIIII 7 50 150011 A II 8 75 16 5 8 75 16 500R A H I 1 5015 1 50 150012 KI 9 50 16 5 9 50 6 500R HEI GR1015 HEIIII G78 1 50011 LR60 15 A IHIII 1 ns 15 H12 150011 A IEIIKI L78 15 L78 1500R B LR78 15 7 00 15 A L 7 00 16 M15 MCI I 5 7 00 1600R 6 5046 KIEI II 10 00 15 A IH 2 75 15 5 8 75 16 500R A ll 7 50 16 A IHIXI 1 50 150011 A 1 9 50 I6 5 A IJIKI 9 50 15 500R A J Il WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION LT TRUCI 51 4 000 GROUP 4 05 REV 2 83