Need your advice guys. I'm looking at a 2005 , 3500 cummins . I presently own a 2001 2500 ctd and have been very happy with the pac brake I installed in it. With the ats built transmission and commander torque box I can go down to 1st gear and have lock up down to 15 mph. Can I get the same out of the 48re? Let me know. Thanks, Brett.