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Front Differential

This is a discussion on Front Differential within the How-To forums, part of the General Rhino category; Question for the Techno-heads on the front diff. 3 of us down here all seem to have the same problem (if it actually is one) ...


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Old 11-02-2007, 03:59 AM
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Front Differential

Question for the Techno-heads on the front diff.
3 of us down here all seem to have the same problem (if it actually is one) with our Rhinos all under a year old.
When the front wheels are jacked up off the ground, the right hand side one (looking from inside the cab) spins freely but the left hand side is pretty rough and lumpy when you turn it.
We've spoken to Yamaha SA who don't have a clue what we're talking about and are trying to find a brand new one to see if it's "normal"
Anybody got any ideas?
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Old 11-02-2007, 06:30 AM
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mine is that way to i think it is normal
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Old 11-02-2007, 07:33 AM
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We also noticed it when duning with them. The wheel just turns a little while the other spins like crazy.
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Old 11-02-2007, 08:30 AM
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I will check mine this afternoon, but my buddies does it too.

Well looking at the specifications for the Rhino they say it has a limited slip front diff that can also be locked. Knowing that and looking at the diagram for the front diff, it appears that this maybe normal. In the diagram Yamaha accomplishes the shift between 2 wheel, 4 wheel, and 4 wheel locked by use of a splined collar that shifts to either engage the passenger side axle to the spider gears, or connet the sipder gear and axle to the differential housing allowing for 4 wheel locked. Since they are only disconnecting one axle to achieve this when you attempted to turn the one wheel and it was met with resistance, that resistance is caused by the clutch in the limited slip differential.
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Last edited by funk6294; 11-02-2007 at 08:51 AM. Reason: Automerged Doublepost
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Old 11-02-2007, 09:41 AM
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Phew, looks like things are normal!
Yamaha SA have just ordered 3 front diffs for us from the US, I'll have to eat a bit of humble pie and call them tomorrow but I suppose they should have known anyway......
Funk, your explanation makes sense now, I got a workshop manual and see exactly what you mean

Woooohoooo!! can ride this weekend!!
Thanks guys!
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Old 11-02-2007, 09:45 AM
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It's normal.
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Old 11-02-2007, 01:10 PM
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No problem!!!!!
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Old 11-02-2007, 01:20 PM
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Mine does the same thing....when I rebuilt my axles last I noticed it and thought I screwed something up with the CV's. However, I soon learned it was normal.....and all is well once again.
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Old 11-14-2007, 09:18 AM
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NV

I'm working on a friends 06 450 that has the same problem. (Maybe 1000 miles)
The first sign of a problem was turning left when backing up I heard a brake squeak. Got home removed the wheel, no brake problem. Turned the 1/2 shaft by hand and felt what I thought was a bad wheel bearing. Removed the knuckle, bearings good. So I pulled out the front differential housing.
The oil was clean and had no cooked smell. The differential was not discolored and everything look great except I can not turn the spider gears unless I pry them a large screwdriver. (way to tight)
My 07 660 has a little resistence on the left axel but the 06 450 was tighter.
My question is can the differential be reshimed (Yamaha only services it as a assembly) or should it be replaced or ?
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Old 11-15-2007, 10:21 AM
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I just called Yamaha Customer Relations
(800) 962-7926. They said they have had no complants of this problem. They did record and document my complant. All they would suggest is I take the vechicle to a Yamaha dealer and if the dealer found a problem they can call tech.
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Old 11-15-2007, 01:55 PM
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I noticed last night mine is like that too - it feels like a rough bearing.
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Old 11-26-2007, 08:20 PM
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I had been thinking about this for some time, and while
climbing too steep of a dune this weekend getting stuck I noticed the left front tire not spinning at all while I was in four wheel drive. I locked the front diff and it started to spin normally. Does this mean that these things are 3 wheel drive unless the front diff is locked?
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Old 11-26-2007, 09:42 PM
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Quote: Originally Posted by robndeb View Post
I had been thinking about this for some time, and while
climbing too steep of a dune this weekend getting stuck I noticed the left front tire not spinning at all while I was in four wheel drive. I locked the front diff and it started to spin normally. Does this mean that these things are 3 wheel drive unless the front diff is locked?

Yes, you could say that.

-Bear
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Old 11-27-2007, 05:11 AM
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Quote: Originally Posted by robndeb View Post
I had been thinking about this for some time, and while
climbing too steep of a dune this weekend getting stuck I noticed the left front tire not spinning at all while I was in four wheel drive. I locked the front diff and it started to spin normally. Does this mean that these things are 3 wheel drive unless the front diff is locked?
The rear wheels are locked at all times. So both wheels will spin no matter what. The fronts are only locked if you hit the button and lock them. What this means is that when in 4wd but NOT locked the tire in the front with the least amount of resistance will spin. The tire with the most resistance or traction will not turn. If they both turned the same it would be hard to hold the wheel just like when you lock it into place. Once you hit the button and lock the front diff both front tires will spin no matter what. Most 4 wheel drive trucks are the same way unless you have lockers.
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Old 11-27-2007, 08:04 AM
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people don't believe me when I tell them you can climb olds faster in locked low, I always go up places others can't because they try it in 4 high.
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