Your are right the 570 has no carrier bearing. It sounds like your 4 wheel drive may be staying engaged all the time. The 4wdr should only engage when needed. If it stay on all the time this can cause vibration sometimes. Have you changed the fluid in your front differential, this can cause the demand drive to stay engaged. Try putting your switch in 2wd mode, then jack up rear wheels, put in gear and try to drive. Your back wheels should spin but front should not engage. Be careful because if front is staying locked it will start moving..

 

When I had my red (base model) 2012 570, that was normal to feel vibration under the floorboards when the front drive was engaged and under load. You're right, there is no carrier bearing on the 570, which adds to the vibration. The shaft is spinning anytime the back wheels are turning, so if it were out of balance you'd feel vibration most of the time. The slip yoke at the back of the propshaft has "slide play" in it to allow for chassis flex. I think the only feasible options would be to pull the propshaft (use an air chisel/punch to drive out the pin in the front), change the slip yoke and have a machine shop balance the propshaft.

 

Thanks for the replies, that's what I was thinking. The vibration is definitely different when the front diff is engaged vs not so I know the awd is not staying engaged all the time. I have changed the front diff fluid multiple times during owning it as well, typically an annual maintenance item. Sounds like it is most likely operating normally than. I may look into the slip yoke a little more, maybe try and find another 570 to look at to see if mine seems excessive.

 

Check your U joins at each end of the front drive shaft. Mine were shot, and needed replacing.

 

For the past few years, my front diff will occasionally stay partly engaged after I switch back to 2wd. I'll also get that vibration in the floorboards. If I put it in reverse with it in 2wd and move about 5-10 feet, I can put it in drive and everything is corrected. I don't feel that any performance is lost when it happens. The vibration and increased drivetrane noise is more an annoyance.

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The only thing I noticed, beyond what Katnapper said, was that it tended to steer like one of the old ATVs with the four-wheel drive engaged. Turns would run wide and didn't feel like it was in complete control. Backing up a few feet disengaged it, and a front differential flush and fill fixed it.

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I put my rzr up on jackstands front and rear to check my drivetrain operation. Also I switch to 2wd or turf mode in many corners so I dont push wide, as 4wd does. Most times when I shift between turf mode, 2wd & 4wd I let off the throttle slightly to unload the drivetrain, assisting the shift between modes. As I do on full size shift on the fly 4wd's.
Mileage is low on my 570 so it is quiet (other than rattling brake pads). I am thinking a lot of these drivetrain issues are on higher mileage units?
They don't stay new forever.
A pity to have to chase down drivetrain noises. It can be frustrating.

 

Mine has almost 5000 miles on it and has been fairly maintenance free. Other than your typical air filters and fluid changes the only things I have had to replace are: rear wheel bearings at around 4000 miles, ball joints around 4500 miles, a-arm bushings around 3500 miles, rebuilt primary clutch (weights, pins, buttons, and rollers) around 3300 miles, and just barely replaced the belt and thoroughly cleaned and inspected both clutches. You typically won't see any of those original, factory installed parts last that long on a 1000.

 

Thanks for all the responses. I know the front diff is not staying engaged, I have had it do that before and know what that feels like. It is due for a full fluid change, including front diff flush so I will do all that and see if anything changes. I may need to remove the driveline and inspect the yoke coming off the transmission. Maybe I will even take it for a cruise around town with the prop shaft out and see if that fixes it, then atleast I will know it is something in the prop shaft.