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Rear CV boot

This is a discussion on Rear CV boot within the X2/X4 Transmission & Drivetrain forums, part of the Yamaha Wolverine X2 & X4 847cc SxS category; Originally Posted by Budro2 There was a big discussion about this early on with the 1st wolverine. Chief took readings with a heat gun on ...

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Thread: Rear CV boot

  1. #11
    Turbo 19Wherry's Avatar
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    Quote Originally Posted by Budro2 View Post
    There was a big discussion about this early on with the 1st wolverine. Chief took readings with a heat gun on the CV joint next to the final drive as high as 270 degrees. Many thought some of the heat was from the exhaust or glowing red header pipe. They wrapped there exhaust and installed heat shields. It may have helped a little but the bottom line is that they just get really hot. To hot to touch at all, however I’ve never read a post about a boot giving up from it till now!
    Yea I herd they get really hot. I’m curious as well as to how hot. Temp was in the 80,a 90’s.

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    Do the X machines also have the parking brake in them? Is the brake working OK? Checked cable?
    Certainly a candidate for synthetic grease as boiling point typically much higher...
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    Super Charged Budro2's Avatar
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    Quote Originally Posted by jimclemjr View Post
    Do the X machines also have the parking brake in them? Is the brake working OK? Checked cable?
    Certainly a candidate for synthetic grease as boiling point typically much higher...
    No parking brake in x model.

    If the boot failure is actually heat related I’d be a fan of some synthetic in there with some snake oil ( gear butter ).

    Chief did lower his temps by 80 degrees on the early model by doing the heat shield and wrapping the exhaust but never had boot issues and in the end concluded it was probably not necessary.
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  5. #14
    Super Charged Budro2's Avatar
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    Quote Originally Posted by 19Wherry View Post
    Yea I herd they get really hot. I’m curious as well as to how hot. Temp was in the 80,a 90’s.
    That thread was called REAR DIFFERENTIAL GETTING PRETTY HOT FROM EXHAUST.

    According to chief his dealer said they can get as high as 400. I don’t know if that’s fact or salesman BS but if they do get 400 then the boots should be designed to take that. Personally I doubt they get that high.

    It would be interesting if you could take some temperature readings on it under similar driving as when the boot failed and see what you come up with.

    It would also be interesting to see if that changed with synthetic etc. assuming your not already doing that?
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    If memory serves me correctly when I replaced my right rear axle about 2 years ago I was concerned about the high temps. of the rear diff. and CV joints. I did do some testing out on the trails with a heat gun, after we had ridden about 6 hours. We tested 3 different Wolverine's (2) 2016s and (1) 2017 and all were getting anywhere from around 180 deg. to 225 deg. at the hottest points. When stopped they start cooling off really quickly. A few weeks later I was just playing around in the yard for 30 minutes and the diff. was getting hot but the inner CV joints had not gotten hot in 30 minutes, so I concluded that a lot of the heat in the CV Joints was being transferred to them from the hot differential.

    When I took my rear diff. out to replace the front seal, I made and installed an aluminum shield that covers most all of the diff, shielding it from the exhaust pipe. It may have helped some, but not like I was hoping for. Somewhere in this vast forum there is a thread with pictures of my heat shield. With the 6 inches or so of space between the diff. and the exhaust most of the heat from the exhaust has to be going up and back and not down to the diff. As it has already been mentioned, these differentials just get hot, to hot to hold your hand on for sure.
    Last edited by PapaSkeeta; 06-24-2020 at 07:52 PM.
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    Quote Originally Posted by Budro2 View Post
    That thread was called REAR DIFFERENTIAL GETTING PRETTY HOT FROM EXHAUST.

    According to chief his dealer said they can get as high as 400. I don’t know if that’s fact or salesman BS but if they do get 400 then the boots should be designed to take that. Personally I doubt they get that high.

    It would be interesting if you could take some temperature readings on it under similar driving as when the boot failed and see what you come up with.

    It would also be interesting to see if that changed with synthetic etc. assuming your not already doing that?
    Let's hope thats BS. That is the flash point of most gear lubes.
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    Quote Originally Posted by jimclemjr View Post
    Do the X machines also have the parking brake in them? Is the brake working OK? Checked cable?
    Certainly a candidate for synthetic grease as boiling point typically much higher...
    Quote Originally Posted by Budro2 View Post
    No parking brake in x model.

    If the boot failure is actually heat related I’d be a fan of some synthetic in there with some snake oil ( gear butter ).

    Chief did lower his temps by 80 degrees on the early model by doing the heat shield and wrapping the exhaust but never had boot issues and in the end concluded it was probably not necessary.
    There is a parking brake in X2/X4's it's mid-ship on the front driveshaft.
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  9. #18
    Super Charged Budro2's Avatar
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    Quote Originally Posted by MassiveOverkill View Post
    There is a parking brake in X2/X4's it's mid-ship on the front driveshaft.
    Yes, I believe jimclemjr was referring to it being inside the final drive and potentially hanging up, creating heat!
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  10. #19
    Belt Smoker 1slo_CR's Avatar
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    So ceramic coating the exhaust to help hold heat in would benefit the rear diff. Maybe also wrapping it...
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  11. #20
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    I had weeping from my rear axle at around 500 miles, then the boot slipped off the dif end. I didn't notice it for a while. I cut off the old clamp, and replaced it. No issues until around 4,000 miles. There was a clicking in it, so I replaced the axle. No problems now. Mine was bought new.
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