I have a 2018 570 sp. I have had issues from day one with the power steering. It worked great in 2wd but as soon as you put it in awd the steering would become very very stiff. I took it into the dealer a few times just to be told “ that’s just the way they are” or, “ it’s not throwing any codes so nothing we can do”. Well I finally found a different shop who actually listened to me and drove it while I was there, and confirmed an issue. Well after two new power steering motors ( which didn’t help ) they dug deeper and found the issue is the front differential. There is a new design to the adc in the diff, for 2018. And this new plate for the adc was all worn and binding up when awd was selected. ( to me it sounds like the front diff is being engaged right away as apposed to only when the rear tires loose traction ). But they won’t admit to that. Lol. Anyway. I have a new front differential and the bike finally steers easy in both 2wd and awd. AS LONG AS,..... your not on dry pavement, If you forget the switch is in awd and hit dry pavement it becomes very hard to steer. And they tell me that if I continue to use awd on the dry pavement the same issue will happen again. ( I believe Polaris advertises that you can just leave it in awd and forget about it) but the guy at the shop says with this new diff set up,.. it’s a no no.
Just wanted to spread the word in case anyone has a similar issue.