Hi, sorry if this topic has been covered, I’m brand new as of 10 minutes ago. I just bought a 2012 Grizzly 550 (non EPS). The machine is a cream puff, 50 hours, 200 miles and it is amazingly clean. When I was looking at it to buy it over the weekend, I noticed the display would not change from 4wd back to 2wd after pressing the button even though I rode it up and down the street. The bike is clean enough that I wanted it and I figured it would be something easy. I just went through it, oil and oil filter, air filter, dumped the gas, sea foam’d the intake, etc. It still wouldn’t turn off the 4×4 on the display so I threw it on a jack and sure enough, the front tires were spinning, so it wasn’t just the indicator light, it was not coming out of 4×4. The diff lock came on and off with the button as it should. As I sat there thinking about it while it was idling, I heard the servo come on and the display went to 2wd (ever heard of that movie "Christine" from Stephen King :). So I put it back on the jack and the front wheels were not moving while giving it throttle – so I confirmed it was in 2wd. I took it for a ride and it was great. I stopped in the trail, put it in park, shifted to 4×4, road it, stopped again, put it in park, shifted back to 2wd, rode it,,,, everything was great. I came home to take my daughter for a ride and noticed that while idling, I could hear a servo engaging. I looked at the dash and every few seconds, but randomly, it was shifting from 4wd to 2wd and back. It made me nervous so I rode it easy – probably shouldn’t have ridden it at all. When moving, it stayed in 2wd but when I came to a complete stop, it went into 4wd. I would press the button on the bars to 4wd and back to 2wd and it would shift back to 2wd. This scared me enough that I brought it home and parked it. Has anyone heard of this before. I read articles that said sometimes the machine will take a while to shift out of 4×4 – you need to drive a bit. That’s not the case here since it was shifting back and forth while the machine was parked… Almost like the idle was strong enough that it was shaking the vehicle slightly enough to make a wire jiggle and engage something. It is idling like a dream but the motor is decent size so you can feel the atv "trembling" while idling and I thought maybe that was causing a loose wire or dirty connection to make contact. Anyway, any help would be appreciated. My best guess is that a connection is dirty and needs to be cleaned or a wire is loose. The guy lost his riding area 1.5 years ago and it hasn’t really been used since. He said the last few miles were just from him taking it for a 1/2 mile ride once a month to keep everything lubed up so, even though it hasn’t been used, it wasn’t really stored, it was just sitting in his garage. Has this ever happen to you?? Thanks!!!!
