ok first set of numbers is a part number, second set is a date code based on the 10,000 day calendar started on july 29, 1961, this means your tranny was built may 20, 1974, and i am not sure about the last 4 numberstjones85 said:antone know how to read the numbers on a tranny.
first # PK3681862
second# 4680
third# 3117