SPEEDOMETER GEAR CHARTS 1984 SPEEDO GEAR USAGE CHART P 2 3 THM 400 475 CONTINUED D A R G B I E A V A P TIRE SIZE TRANS E R g H9 5 M ll V A HH 5 IIIIH M 5 HEI a 12 500n me 1 l ENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 62A 1 REV Z 87 SPEEDOMETER GEAR 120 4 337 GROUP