2001 dodge ram 4x4

You said adding the qt. of AFT made it shift into 3rd where-as is didn't shift into 3rd before adding the ATF so apparently it had some effect on it, don't you think? Just guessing on the shift kit cause those transmissions aren't known to shift hard at all. In fact every one I've drove was a slush box. The trans. in a 71 Demon is quite different. They shifted firmer back then and depending on what shift kit it had it could have been much more aggressive. Not all shift kits are the same. I don't claim to be an expert by any means but I have been rebuilding transmissions for nearly 30 yrs. so I'm not a newbie. Just giving my .02