#CHEVROLET TRANSMISSION CASTING NUMBERS SERIAL NUMBER#
#CHEVROLET TRANSMISSION CASTING NUMBERS CODE#

On the Turbo Hydra-Matic the number is on a light blue plate that is atttached to the right hand side of the transmission case. Located by a stamp located on the right side of the case on the lower rear, just ahead of the transmission extension for the Muncie 4 speed. This was followed by a number of the assembly line. It will appear with a letter, A-M, (I was not used), signifying the month followed by the last digit of the year of manufacture. There will also be a manufacture date code. The identification number will be found on a triangular metal tag attached to the air horn. See the Specific Information and Notes page. (Corvette changed the coded in about August to the new codes and continued them in 1970)ДЈ733975 Left side and 3733976 Right side for All 350 cubic inch enginesДЈ880827 Left side and 3880828 Right side for All 427 cubic inch enginesД¬asting numbers are located in the valve rocker are only visible with the valve cover removed. Special note for Late 1969 check the 1970 codes. These were rare and were only used on the 3.70:1 and 4.11:1 rear ends. There may also be a HT stamped, along with the gear ratio, which would stand for Hi-Tork used for Positraction Rear axles.

#CHEVROLET TRANSMISSION CASTING NUMBERS CODE#

The code will be followed by the month of manufacture, (1-12 or 01-12) and then the day of manufacture, (01-31). Rear axle codes are located by the use of a stamp on the front right side of the differential carrier housing. Holley 3 x 2BC, K66 and Turbo hydra-matic Rochester Q-Jet, K66 and Turbo hydra-matic ZL1 Performance package L88 and Turbo hydra-matic ZL1 Performance package L88 and M22 4 speed Holley 3 x 2BC, Mechanical lifters, MA6 and 4 speed L89, L71 with Aluminum heads and Turbo hydra-matic Holley 3 x 2BC, Mechanical lifters and Turbo hydra-matic Holley 3 x 2BC, Mechanical lifters and 4 speed Holley 1 x 4 BC, L88 H-D and Turbo hydra-matic Rochester Q-Jet, Hydro lifters and Turbo hydra-matic Rochester Q-Jet, Hydro lifters and 4 speed Q-Jet, Special Cam, Air conditioning, K66 and 4 speed Rochester Q-Jet, Special Cam, Air conditioning and 4 speed This was followed by 3 or 4 numbers for the date of manufacture (1-12 for the month and then the day 1-31). F is the prefix used to designate the Flint manufacturing plant. The block also has a letter that indicates the month of casting (A-L for January to December)Д«eginning with this year continuous numbering of the engines was discontinued. The V-8 casting numbers are located on the right side of the block opposite the casting number. * Figures from service bulletin information.Д«lock casting numbers are located on the top left surface of the flange formed at the rear of the block for the flywheel attachment.

#CHEVROLET TRANSMISSION CASTING NUMBERS SERIAL NUMBER#

The final serial number of the month is used to determine the month of production. The remaining numbers are the sequence production numbers. The 6th digit is a 9 and it is for the year. There were no coupes made during the T-Top years. The 4th and 5th numbers stand for convertible (67) or T-Top (37). The 1 stands for the Chevrolet Motor Division. 16,633 were Convertibles and 22,129 were T-Tops. There were 38,762 Corvettes made in 1969.

Chevrolet transmission casting numbers