View Full Version : Was the 4.11 ratio available for 72 LT1

04-11-01, 09:22 PM
My 72 LT1 was 4.11 gears in it and I would like to know if this ratio was available or was it aftermarket?

04-11-01, 09:36 PM
The 4.11 ratio was an option (code AC) in 1972 and you could get it with the LT1 engine option.

04-12-01, 10:03 PM
Thanks,The corvette black book is a little vague. In one section it lists it as an option and under one of the photo's it implies that it was only available with the ZR1 option.

04-13-01, 10:21 AM
In 1972, Corvette offered 3:36, 3:55,3:70 and 4:11 rear gear sets. The 4:11 set had a code AC