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Rear End Diff Problems, mounts weak

This is a discussion on Rear End Diff Problems, mounts weak within the How-To forums, part of the General Rhino category; The rear diff. mounts on my rhino have been reinforced before I bought it. Someone welded angle to the tubing to stiffin up the frame. ...


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Old 01-06-2010, 08:14 AM
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Wrench Rear End Diff Problems, mounts weak

The rear diff. mounts on my rhino have been reinforced before I bought it. Someone welded angle to the tubing to stiffin up the frame. Since then the Diff. bracket welds have cracked so I rewelded them. It seems that the 2 top bolt brackets are not quite strong enough for the Rhino. Has anyone else had this problem? I added a third bottom bracket to the diff. in hopes to firm it up some. Any other ideas would be great.
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Old 01-06-2010, 09:41 AM
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Very common problem. A few bolt on lower mounts are available.
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Old 01-06-2010, 12:32 PM
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Thumbs up

Thanks for the input, I was thinking maybe something was missing. I think the extra brace I added will help but I may look into adding another in the front of the rear diff. as well.
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Old 01-06-2010, 12:34 PM
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usually just adding the lower rear brace will be fine. Unless the top mounts are already really bad. I raced mine with without a brace, and as long as you keep on top of keeping those diff mount bolts tight, you shouldnt have a problem. The problem arises when the bolt loosen up, and the diff starts moving around.
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Old 01-06-2010, 12:42 PM
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I agree 100%, thats when the problem started. I bought it used and found the bolts in the diff. loose when i got it. The lower bracket i made is fairly heavy, I rewelded the upper brackets and torqued them down good, I will run it for a while and keep an eye on it. Thanks for your help.
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Old 01-06-2010, 01:52 PM
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FRAME

I made new brackets like the new ones but they are heavier. Do you think i should make the lower ones also ?
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Old 01-06-2010, 02:11 PM
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I would, couple peices of angle iron and about 45 min. and your done, sure firms up your diff. There is a rear lower frame mount on the diff. that is real close to the reciever hitch frame mount. I addaded some pics to look at.
Attached Thumbnails
Rear End Diff Problems, mounts weak-rhino-001.jpg   Rear End Diff Problems, mounts weak-rhino-002.jpg  
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Old 01-06-2010, 04:50 PM
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I'm having the same problem with my rhino. The back cross bracket that the top diff mount is on had a crack in it and I had it welded but the the weld broke and now half of the bracket broke off. Im trying to figure out whick well be the best to fix it
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Old 01-06-2010, 05:10 PM
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Just get the trail logic brace package ... 2008 Yamaha Rhino Special Edition 700FI - CHECCA.net ... and repair the stock mount.
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Old 12-08-2010, 06:11 AM
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I got a 2006 rhino, broken brace and bad welds. I had didn't see the problem when I got it. I fixed the welds $90 and installed the trail logic brackets $135. solid frame and differential now. Bolts in with no modifications.
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Old 12-08-2010, 07:10 AM
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I believe Fabtech also makes a bolt-on rear diff support. I have the trail logic on one of mine but I have thought about trying a different one. Any other suggestions in terms of brands and/or designs?
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Old 12-08-2010, 07:15 AM
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Quote: Originally Posted by cjkranz View Post
I believe Fabtech also makes a bolt-on rear diff support. I have the trail logic on one of mine but I have thought about trying a different one. Any other suggestions in terms of brands and/or designs?
I have the CRB rear diff support, its tough. I just magnafluxed it, with 4000 rough miles and no cracks. It does add 2 more supports for the rear diff.
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Old 12-08-2010, 07:24 AM
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You can add an intermediate shear plate to help with frame flex.

Check this out from Billet King

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Old 12-29-2010, 03:51 PM
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This just happened to me. On my 04 Rhino, The rear bracket that attaches to the frame failed causing my rear end to drop. Consequently the driveshaft is toast as well as the gear the rear disk is mounted to. Wore the splines right off, broke a gear, it's a mess.

Funny thing, it didn't make a noise untill the rearend stopped driving....

Rhino Roger: If you see this, Are you concerned about your rear diff being too rigid after adding the new support? Had any problems with your setup? I'm considering doing something very similar to what you had. Thanks for the pics!!!
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Old 12-29-2010, 05:58 PM
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Quote: Originally Posted by cjkranz View Post
I believe Fabtech also makes a bolt-on rear diff support. I have the trail logic on one of mine but I have thought about trying a different one. Any other suggestions in terms of brands and/or designs?
I have the Fabtech one and it picks up 3 more mounting points and very beefy.
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