Front diff question - lumpy feel when rotating tire
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Front diff question - lumpy feel when rotating tire

This is a discussion on Front diff question - lumpy feel when rotating tire within the Transmission & Drivetrain forums, part of the Yamaha Wolverine Gen 1 708 cc SxS category; I was doing some maintenance and was checking front end components. Had front end jacked up, checked ball joints, tie rods,etc. Gave the passenger side ...

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Thread: Front diff question - lumpy feel when rotating tire

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    Front diff question - lumpy feel when rotating tire

    I was doing some maintenance and was checking front end components.
    Had front end jacked up, checked ball joints, tie rods,etc. Gave the passenger side tire a spin, and it was as expected. Got onto driver side and when spinning the wheel, something felt "lumpy". I live near the dealer so I drove over and they had a new 2016 left over in the yard. They jacked it up and both wheels spun freely, no lumpy or indexed feeling, so I figured bearings or CV joints.
    Went home and started ripping it apart.....no problem with outer bearings. Took off Upper CV boot and the joint was fine. Then took joint apart and slid the empty splined shaft end back into the diff, and spun it and got the same lumpy feeling.
    Dealer and techs didn't have much to say, besides the fact they hadn't needed to troubleshoot any before. So I went home and buttoned it all up cause I had a weekend tour scheduled.
    No issues on tour, plenty of times in 4wd, a few with diff lock, and almost 95% of the day in low gear cause the going was tough, through lots of high water, mud, snow and ice, and tons of rocks. If you've been in the Barry's Bay area, you'll know what I mean.
    Anyways, washed her down today and tried the rotation test again and it was the same.....lumpy on the drivers side, no worse that I could tell.

    So.....is it supposed to be like that? Other brand new machine at shop was not like that. Is yours perhaps? Please let me know if yours is.

    Thanks
    Grant
    2016 Wolverine SE EPS
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    What your calling lumpy or indexed feeling sounds like your referring to the way the front differential is made. Yes, my driver's side front wheel does not spin as freely as the passenger's side wheel and makes a slight noise in the differential if you listen carefully, this is normal. I have had (2) 700 Yamaha ATVs and they are the same way, one side of the front wheels makes a slight noise and doesn't spin as smoothly as the other side. The new models may be different since Yamaha engineered a lot of sound reducing designs into the new models which included a different type of cut gears. From 2018 Gen. 1 back to 2007 (all ATVs and SxSs) I'm not aware of any changes to the front differentials, as far as I know they all make the noise. Maybe someone else can add something I'm not aware of.
    Last edited by PapaSkeeta; 05-06-2019 at 09:05 PM.
    Budro2 likes this.
    2016 R Spec EPS, Realtree, 29x9x14 & 29x11x14 Tusk Warthogs on ITP SS112
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    Just went through the same thing myself, thought I had a bad wheel bearing, tore it apart and it was fine. Called the dealer and the mechanic said all normal!

    I was told it’s just the way the limited slip differential works!
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    Quote Originally Posted by Budro2 View Post
    Just went through the same thing myself, thought I had a bad wheel bearing, tore it apart and it was fine. Called the dealer and the mechanic said all normal!

    I was told it’s just the way the limited slip differential works!
    That too is what was 'suggested' to me by the dealer, but it sure didn't sound like a definitive answer.....which is why I put it to the crew here on this forum!

    Thanks for the quick replies there fellas, much appreciated.
    2016 Wolverine SE EPS
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    Pit Stop Kapper's Avatar
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    I have a 2019 X2 Rspec. The other day I added my wheel spacers and I also jacked up the front end and noticed the exact same thing. I thought I had something going out on the drivers side, while the passengers spun freely. But ran great on the trails last week, no problems. I'm kinda glad you guys had they same issue.

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    Black Magic
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    they're not free wheeling. I am not sure where the control is doing the engagement and 4x4 lockup on these (at this time). I have driven mine mostly in AWD to break it in and one long stretch in 2WD. A few short Locked Front tne just to be sure its working at slower speeds. No problems.

    I do get situation going from backing up to forward as in a 3 point turn the shifter is very hard to pull out of gear and get past neutral to the other direction gear. I am figuring its something loading pressure in the CVT gearing system causing this. Never had this issue on a Kingquad though. I was planning on asking the dealer when they're checking it out.
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