Beginning in 1968, the car's last eight numbers of the VIN were stamped on the transmission.On October 21, 1968, another letter code was added to the plant prefix number to identify Muncie transmission ratios.A-JanuaryĮxample: N7B27=Muncie,4 Speed built on February 27.
#Th400 serial number decoding serial number#
In 1967 the serial number was changed, it consisted of a plant prefix letter, year number, and month produced (with a letter code instead of a number).From 1964-66 transmissions carried a source serial number, which consisted of a plant prefix letter, a production date and a day/night shift suffix.Įxample: R315N=Muncie,4 Speed built on March 15 during the night shift.
![th400 serial number decoding th400 serial number decoding](http://chevellestuff.net/qd/images/trans/th400_71_cd463.jpg)
Source Serial Number Code (Automatic & Manual) These still should give you enough information to check the transmission installed.ġ. I covered Source Serial Number Code and Model Identification Code but not Production Code Number. These codes were stamped on the right side of the transmission case ahead of the extension.Įxception : 1964 were stamped on the left side of the case rear of the cover.These codes were stamped on a metal tag located on the right side of the transmission.Įxceptions are : 1965 stamped them either on a metal tag or the low servo cover.ġ966 were stamped on the low servo cover.
![th400 serial number decoding th400 serial number decoding](http://www.camaros.org/images/pages/decoding/trans_th350_vin.jpg)