The Stovebolt Site Forums The Shop Area Driveline What year 3-speed is this?

Todd - Can you post a picture of the entire transmission so we can see the side cover assembly too?

Preliminary info based just on the casting numbers shows the main case was used in many car and truck applications (see years and models indicated). The tail shaft extension housing was also used on many different truck and car applications, with at least one reference I found (not shown below) that it was used on 1963-65 Corvettes with 3 speeds.

The main case date casting code "K1555" seems to indicate it was built November 15th, 1955 (K = November 15 = day of the month 55 = build year). That would align with a 1955.2 2nd series truck if was originally a truck unit.

There should be a stamped identification number on the transmission main case. Looking at the rear of the transmission, it should be stamped onto a machined flat surface on the right rear upper corner of the main case. It should include a letter identifying the plant that built it, followed by 1 or 2 digits for the month and 1 or 2 digits for the day of the month built.

Hope this is of some help.