Transmission Identification
The transmission identification code is located on the rear righthand side of the transmission above the oil pan, see figure. For code and model interpretation refer to figure. The code numbers that indicate the Julian date, tell what day of the year the transmission was built. It should be noted that the transmission model year starts in mid year. This means that the first transmission built in any model year will start with a higher Julian date.
For example; if the first transmission in 1988 was built on August 5, then the Julian date starts at 218 and goes to 365 (which is December 31). The Julian date will then drop to 001 (which is January 1), and then continue to 217 (which is August 4, 1987).