Rear axle installation problems, HELP
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Rear axle installation problems, HELP

This is a discussion on Rear axle installation problems, HELP within the Transmission & Drivetrain forums, part of the Yamaha Wolverine Gen 1 708 cc SxS category; So I just changed a rear axle boot. Constant velocity shaft popped out no problem. Tried to use a soft face mallet to knock it ...

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Thread: Rear axle installation problems, HELP

  1. #1
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    Rear axle installation problems, HELP

    So I just changed a rear axle boot. Constant velocity shaft popped out no problem. Tried to use a soft face mallet to knock it back in. Looked easy enough online. Wouldnít go no way no how. Got the wife to whack on it while I held it straight, still no luck. Got a friend to hit it with a somthing bigger, after a few licks it went in, then I noticed the other side was popped out. I measured the distance of the side now popped out and itís the same distance as the inside from the end of the installed axle to the outside. All I can think is itís air pressure from the axle seals sealing well around the shaft. Itís my first experience with other than a pickup axle, Sorry if it sounds stupid! Noticed bad seals in the knuckles as well. Wheel bearings seem fine. Changing the seals. Any tips on installing them so as not to damage, other than a flat board and a vise etc. I donít have a press but Iíd take it somewhere if necessary! Thanks in advance!!!!
    2016 R SPEC SE
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    Well that was interesting. I called the dealer and spoke to the service dept. They were stumped as well. I got to thinking that with the vent tube it shouldnít be pressurized enough to push the other side out. I knocked the side back in that was now popped out, and it went the other way again. Iím thinking those 2 shafts are touching inside or only 1/6Ē apart. There must be a little slack where it can go past where it is at rest and one contacts the other shoving it out. There is a fine line between not enough hammer and to much hammer. If youíve never done a rear axle boot before on this machine and you donít need to tear down both sides be careful on the amount of oomph you give it. Good news for me was it led me to discover bad seals in the other knuckle before destroying wheel bearings!

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    Far from stock Atcdan13's Avatar
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    I pulled my left rear axke once to replace the oil seal on the rear diff. I had a hard tike getting itcout but it went back in ok for me
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    Super Charged Budro2's Avatar
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    Lol yeah that’s what I expected. I read about guys struggling getting them out, not in!
    2016 R SPEC SE
    EMP bumpers
    Viper Elite 4000 winch
    Super ATV flip up windshield
    Sway bar delete
    Tusk visor
    Fabricated quick detach headache rack w/ optional storage rack
    Hunterworks sheeve, 16gr weights, green spring, 1mm shim, modified CVT cover
    Razorback belt temperature gauge, Blowhole CVT fan
    HW exhaust tip w/ stock arrester mod, PCV, ais block off plate
    28x10x14 CST Clinchers 14x7 STI HD3 black gloss wheels,
    Eibach springs
    Seizmik strike mirrors

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    Quote Originally Posted by Budro2 View Post
    So I just changed a rear axle boot. Constant velocity shaft popped out no problem. Tried to use a soft face mallet to knock it back in. Looked easy enough online. Wouldnít go no way no how. Got the wife to whack on it while I held it straight, still no luck. Got a friend to hit it with a somthing bigger, after a few licks it went in, then I noticed the other side was popped out. I measured the distance of the side now popped out and itís the same distance as the inside from the end of the installed axle to the outside. All I can think is itís air pressure from the axle seals sealing well around the shaft. Itís my first experience with other than a pickup axle, Sorry if it sounds stupid! Noticed bad seals in the knuckles as well. Wheel bearings seem fine. Changing the seals. Any tips on installing them so as not to damage, other than a flat board and a vise etc. I donít have a press but Iíd take it somewhere if necessary! Thanks in advance!!!!
    Quote Originally Posted by Budro2 View Post
    Well that was interesting. I called the dealer and spoke to the service dept. They were stumped as well. I got to thinking that with the vent tube it shouldnít be pressurized enough to push the other side out. I knocked the side back in that was now popped out, and it went the other way again. Iím thinking those 2 shafts are touching inside or only 1/6Ē apart. There must be a little slack where it can go past where it is at rest and one contacts the other shoving it out. There is a fine line between not enough hammer and to much hammer. If youíve never done a rear axle boot before on this machine and you donít need to tear down both sides be careful on the amount of oomph you give it. Good news for me was it led me to discover bad seals in the other knuckle before destroying wheel bearings!

    If it was the rear it may be because it is a spool not a open diff so that tube the splines are sliding in are maybe the same sealed tube straight through. The spline is sealing like a piston and pushing the other out from pressure buildup. The seals and/or vent would have no relation to that occurring. Never been in one to see if that tube is straight through one piece sealed but thinking it may be and why that happened possibly.
    Budro2 likes this.

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    Revisiting this thread I started awhile back incase someone ever has the same problem. I finally figured out what the issue was for not being able to pop an axle in, without knocking the other axle out! This problem plagued me all 5 times I had an axle out to fix a boot or replace an axle due to a bad CV joint. Iíd pop it in and the other side would be out, back and forth. I could sit behind it with an axle in both hands and literally feel them contacting each other. Didnít seem right and really stumped me. Twice I ended up grinding off a 1/16Ē or so of the end of the axle and then it would go in. When I had my final out to fix a leak and changed the seals I found a small amount of debris right behind one of the axle seals and also a small amount inside dead center between where the two axle ends meet. Both spots are natural traps for particles to get caught in when traveling around in the fluid. I guess itís almost a good thing because then there not running around in there getting in the bearings. Not all the debris was grey or metallic in color, some was brown and I assume may have been from the wet brake. There is a very small tolerance between the axle ends inside there. This debris that got trapped in between them would then settle and drop down in the bottom when one axle was removed. Then upon installation it would get compressed between the two ends pushing the other side out. Grinding a little bit off the end provided just enough room to get it back in. When I installed both axles this time, everything went normal for the 1st time. This machine has 5100 miles on it but the first axle installation issue happened with much lower miles. My fluids have been changed more often than recommended, the differential makes no noise, it turns smoothly and tight with no excessive backlash at all. Even though I was extremely worried at first Iím convinced this was mainly stuff that would have normally got drained out at the 200 mile service. Iíll change the fluid again on the engine oil interval and run it through a screen or filter to see if there is anything else, then switch to synthetic and add some HW gear butter! Mystery solved!!!
    erik, MORSNO, Scurvy and 1 others like this.
    2016 R SPEC SE
    EMP bumpers
    Viper Elite 4000 winch
    Super ATV flip up windshield
    Sway bar delete
    Tusk visor
    Fabricated quick detach headache rack w/ optional storage rack
    Hunterworks sheeve, 16gr weights, green spring, 1mm shim, modified CVT cover
    Razorback belt temperature gauge, Blowhole CVT fan
    HW exhaust tip w/ stock arrester mod, PCV, ais block off plate
    28x10x14 CST Clinchers 14x7 STI HD3 black gloss wheels,
    Eibach springs
    Seizmik strike mirrors

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    Great info to share, thanks Budro2.
    2016 Alpine White Wolverine R-Spec SE (Sold)
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