1980 84 TRUCK 1 23 MANUFACTURING SOURCE TRANSMISSION STAMPING INFORMATION A Continued POSITIONS 4 5 DAY PRODUCED Numeric numbers will be stamped in positions 4 5 to identify the day produced Example O1 First day produced I 10 Tenth day produced EXAMPLE 1580 TRUCK CHARACTER POSITION 1 2 3 4 5 N O H O 5 MANUFACTURING SOURCE A MUNCIE 4 SPEED 117 mm MODEL YEAR I 1980 MONTH PRODUCED JUNE DAY PRODUCED 5TH DAY OF THE I MONTH SOURCE DESIGNATION WILL BE LOCATED AS FOLLOWS 3 Speed 4 Speed Light Duty Passenger Lower right left hand side of transmission below cover 4 Speed Truck Rear face of trensmission case below retainer i 3 Speed Automatic On left side of oil pan 3 Speed Hydramatic Stamped on plate rear right hand side of transmission case i l GEllERAL MOTORS SERVICE PARTS DPEFETIONS LT TRUCK 5zA 4 l