TRUCK TRANSMISSION PRODUCTION CODE EXPLANATION I The truck transmission codes are located as follows k THREE SPEED SAGINAW TYPE The code is stamped on the left side of the case just below the side cover I The production code number contains the source code mode1 year and build date EXAMPLE V y N H A 10 SOURCE CODE MODEL YEAR A BUILD MONTH DAY CODE y S 3 Speed 1985 A Jan K Juli 10th Saginaw Type B Feb M Aug C Mar P Sept D Apr R Oct E May S Nov H Jun T Dec THREE SPEED TREMEC y The identification code is located on upper left attachment ear top side The production code number contains the source code month model year and build sequence EXAMPLE SU G H OOO1 SOURCE CODE MONTH YEAR BUILD SEQUENCE Tremec y A Jan G Jul 1985 B Feb H Aug C Mar J Sept D Apr K Oct E May L Nov F Jun M Dec 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52R 24 REV 1 88