4l80 torque converter lockup question.

dirty_max

Member
Jan 27, 2013
815
2
18
eureka il
Alright gentlemen, i know this isnt duramax or allison related but i know a lot of you guys have knowledge in other departments as well. I have a group of friends that pull gas trucks. They run in 1st gear and would like to be able to lock the converter. The problem is that there is no way to lock it while in first gear. From what i know, the oil is blocked and physically cannot lock the converter while the trans is in 1st. Anybody ever found a way around this or know someone i can contact that may know about it?