This week I've been working on a transmission swap. My car is a 2005 Crown Vic, and the transmission was removed from a 2005 Grand Marquis. The tag on the original transmission indicates a 10/2004 production and the tag on the replacement transmission indicates 04/2004 production.

My dilemma - The replacement has a larger torque converter. Assuming that both converters are in good condition, is it important that I use the larger or smaller?