Rear End Diff Problems, mounts weak - Yamaha Rhino Forum - Rhino Forums.net
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post #1 of 15 (permalink) Old 01-06-2010, 08:14 AM Thread Starter
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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.
2004 660 Rhino
27" MudLites

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post #2 of 15 (permalink) Old 01-06-2010, 09:41 AM
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Very common problem. A few bolt on lower mounts are available.

Ben Haines
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post #3 of 15 (permalink) Old 01-06-2010, 12:32 PM Thread Starter
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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.

Its all good just some is better than others
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post #4 of 15 (permalink) 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.

Ben Haines
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post #5 of 15 (permalink) Old 01-06-2010, 12:42 PM Thread Starter
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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.

Its all good just some is better than others
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post #6 of 15 (permalink) 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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post #7 of 15 (permalink) Old 01-06-2010, 02:11 PM Thread Starter
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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.
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Its all good just some is better than others
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post #8 of 15 (permalink) Old 01-06-2010, 04:50 PM
Paper Boy
 
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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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post #9 of 15 (permalink) 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.

Christopher Checca
2008 Yamaha Rhino 700 FI Sport Edition
4500LB Venom Winch
UTV Concepts Gauge package
Trail Logic brace package
Minooka, IL 60447
http://www.checca.net/UTV/utv.htm
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post #10 of 15 (permalink) 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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post #11 of 15 (permalink) 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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post #12 of 15 (permalink) 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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post #13 of 15 (permalink) 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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post #14 of 15 (permalink) 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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post #15 of 15 (permalink) 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.

Rhino Rob 2007 Sport Edition, hardmount K&N, Was Dynajet Now back to Mikuni Jets, Dyantek cdi, UTV Crap OD greaseless sliders and 16G weights, LSR Mid Travel, Walker Evans Shocks, GBC Dirt Tamers, Diablo wheels,4 seater.
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