Hey guys, so I recently got a 2000 mustang gt with a b&m hammer shifter and my trans ended up going out, so went she was and got it rebuilt. Now I have one problem, when overdrive is on, my car downshifts hard but when overdrive is off it has smooth shifts. I would definitely keep overdrive off but it wastes so much gas, any idea why it would do this? Transmission guys says the red button for overdrive has 4 stages where you can turn the torque converter off and a bunch of different ****. I don’t believe it. They said the shifter is programmed to do that. Is that true?