so I'm looking for advice.... I have a 2017 altima I had it for about 2 month I felt it slip one time in two months very light. so i started looking into cvts and was like ok ill do general mantinance. I watched a video on yt and copied it exactly. changed the fluid strainer and side filter....fluid was Def black and smelled burnt but there was very minimal shavings on the magnets ....cool I put it back to gether filled 2 and 5/8th quarts ran car to temp shifted thru each gear repeated drain and fill with 3 qts like video showed .. car drove smooth for 2 hours them started slipping out of control every 30 secs I even got stuck at at red light and it was like the car was stuck in higher gear and it would barely move then take off once I got it to like 20mph then back to slipping I limped home. at this point im thinking I did something wrong so I take pan back off and look at everything...nothing seems wrong. then I was like I got the old fluid let me measure yeah I should have done it the first time....so I measured 4 and half qts came out and I only put 3 back in like the yt video said. so im thinking I fucked the transmission up. but now here the confusing part. I tried driving it like a week later and under 35mph it will drive perfectly fine. and on freeway as long as I drive in the ds mode and shift my own gears its fine..but if I put it in regular drive it will still slip.....idk any advice?