SPEEDOMETER GEAR CHARTS C286 l 1978 SPEED0 GEAR USAGE CHART l VX DRIVE DRIVEN GEAR GEAR COLOR SLEEVE ADAPTER A 8625838 10 Purple 3987919 19 Natural 345215 H 3950354 9744 Y B 6261785 10 Purple 3987915 18 Brown 345215 J 3905497 8000 T 3957921 21 Red 345215 K 6273215 8974 B 1 3957920 20 Blue 345215 l 3987922 22 Silver 345215 l 1978 SPEED0 GEAR USAGE CHART V HBH CAR 4 l s 45 Q 7 V l T MN A IIIB l GR70 5 cms 1s A I IIE Gmc 15 HR75 15 H IQ I I Hmo 1s HR78 15 m E Il IEIIII Il l FR78 15 Gmc 15 GR7845 2 73 3 ag I3 IIIII cmvms GR78 15 III K Hmo 15 r ams 1s IEIH I i l 3 X I A l l l GM PARTS DIVISION GENERAL MOTORS CORPORATION CHE ROLET 10 l 4 000 GROUP 4 4 c REV 9 80 l