T19 MUNCIE MANUAL TRANSMISSION PRODUCTION CODE EXPLANATION Muncie Truck 4 Speed Stamped on the rear face of the transmission case below the rear retainer The production oode number contains the source code model year and build date EXAV L SOURCE CODE MODEL YEAR BUILD MONTH DAY CODE N 4 Speed 1979 A Jan I0th Muncie B Feb CH465 c Mar D Apr V E May H June K July M Aug P Sept R Oct S Nov T Dec 350 Model Turbo Hydre Matic Transmission The production code oonsists ofthe source code followed by the model year month date and shift produoed EXAMPLE B 9 K 05 D MONTH DAY SOURCE CODE MODEL YEAR CODE CODE SHIFT CODE B Parma 1979 A Jan 5 th D lst Shift Y Toledo B Feb N 2nd Shift J GM of Canada C Mar D Apr E May H June K July M Aug P Sept R Oct S Nov T Dec i The identification code number is stamped on the right side of the transmission oil pan Q l i i 5nEnA morons sim ci g AnTs Orilztgolls LT TRUCK 52A