Trans ID
Team Owner
Joined: Aug 2000
Posts: 21,440
Likes: 459
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
If your car has it's "original" tranny, it's a Borg-Warner Super T-10. They were used Feb/March of '74 to 1981. I do not think BWs had a way of determining the ratio(close or wide) from a code on the outside like some Muncies did.
Le Mans Master
Joined: Mar 2004
Posts: 7,458
Likes: 1,484
From: Little Rock AR
The tranny should have a "W" number. The "W" is for Warner, the next digit is for the month of production where "A" is for Jan, "B" would be Feb, etc, the next digit(s) are for the day of the month, and the last digit is wide or close ratio where "1" is for wide. I am not sure what it is for close but if it isn't a "1", it must be a close ratio. 
-Mark.
-Mark.
Melting Slicks
Joined: Apr 2000
Posts: 3,341
Likes: 6
