See Figures 1, 2 and 3
Much like the engine identification number, all transmissions are equipped with an identifying number stamped in their housing. All the transmissions utilize a 2-digit code.
On manual and 3-speed automatic transmissions, the 1st code digit indicates the year of manufacture. The letter code indicates the same year as shown on the vehicle identification chart in this section. The remaining 1 digits are the manufacturing sequence.
The code on the 4-speed transmission can be broken down as follows:
The identification number is stamped into the upper, left-hand, front area of the manual transmission, into the lower, left-hand, front area of the 3-speed transmission, and into the lower, left-hand mid-section of the 4-speed transmission.