Rear Diff


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Rear Diff

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Rear Diff - 11/17/2008 8:03:35 AM

chris3man

Posts: 45
Joined: 11/6/2007
Status: offline

I was riding yesterday and pulled back up at the house and noticed the rear diff was smoking. It was scorching hot and the right rear axle had slid out half an inch. I put it up and I'm going to check it out this afternoon, but anyone have any ideas on what may be wrong? There was no noise that could be heard while driving, even while creeping along.

Thanks for any help

Chris

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05 Brute 750. Woodsman Green.
29.5 Swamptlites on stock rims
Dynajet 138/144
Custom Center Snorkle
TwinAir Filter
2500lb winch on receiver (movable from front/rear)

Post #: 1

RE: Rear Diff - 11/17/2008 2:49:55 PM

chris3man

Posts: 45
Joined: 11/6/2007
Status: offline

OK, drained the rear diff oil today and it was clean and everything still turned freely. I took the axle off and popped in back it, but rode the brute 20 feet and it popped back out. Any ideas?

_____________________________

05 Brute 750. Woodsman Green.
29.5 Swamptlites on stock rims
Dynajet 138/144
Custom Center Snorkle
TwinAir Filter
2500lb winch on receiver (movable from front/rear)

(in reply to chris3man)

Post #: 2

RE: Rear Diff - 11/17/2008 3:05:21 PM

Butch

Posts: 549
Joined: 12/12/2006
From: Collierville, TN
Status: offline

There is a ring on the end of the axle the sits in a groove. When the axle slides into the diff it catches and hold the axle in place. Check that first and see if it is missing. I don't know what is generating the heat? Especially if it was full of oil? If the inboard joint was hot then your axle joint might be damaged or lost the grease? Good luck!

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2007 Brute 750 Team Green 2" HL lift, 2" snorkel, 29.5 Laws, Outlaw clutch kit, HMF Pipe, a bunch of stickers.

03 Rincon Sold!
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(in reply to chris3man)

Post #: 3

RE: Rear Diff - 11/17/2008 9:37:21 PM

chris3man

Posts: 45
Joined: 11/6/2007
Status: offline

The ring on the end of the axle is still on..... That was the first thing I checked.

_____________________________

05 Brute 750. Woodsman Green.
29.5 Swamptlites on stock rims
Dynajet 138/144
Custom Center Snorkle
TwinAir Filter
2500lb winch on receiver (movable from front/rear)

(in reply to Butch)

Post #: 4

RE: Rear Diff - 11/17/2008 10:43:07 PM

bocephus660

Posts: 2068
Joined: 7/23/2005
From: joaquin ,tx usa
Status: offline

Is the inboard CV broken? Try sticking your axle back in and see if you can still yank it out with it still in the bike? The splines look ok? With the axle out of the diff can you feel anything in the diff thats loose or broken?Splines in the diff look ok?Any lift on the bike? Are you sure you put it all the way back in? If your rear diff is bad it will be the first one I have ever heard of but its possible.

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(in reply to chris3man)

Post #: 5

RE: Rear Diff - 11/17/2008 11:44:29 PM

dgraham225

Posts: 710
Joined: 9/12/2004
From: Watson, LA
Status: offline

if the rear diff is bad, i just so happen to have one for $100 shipped, LOL!

i havent heard of many people busting them either, i have seen the lock nut back off on the pinion gear and let it eat the **** out of the ring gear though. but i cant remember if that was a front or rear diff that happened to...but that could cause some heat?! haha!

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Danny Graham

08 RZR, snorkeled, 32" silverbacks, ITP ss212's, 1" spacers, 2" prolift, HL springs

02 Prairie 650, let the mods begin!

(in reply to bocephus660)

Post #: 6

RE: Rear Diff - 11/19/2008 7:13:57 AM

chris3man

Posts: 45
Joined: 11/6/2007
Status: offline

OK, I figured it out.... I friend of mine changed a boot for me the other day and when he put the axle back in, he put the knuckle on upside down.

_____________________________

05 Brute 750. Woodsman Green.
29.5 Swamptlites on stock rims
Dynajet 138/144
Custom Center Snorkle
TwinAir Filter
2500lb winch on receiver (movable from front/rear)

(in reply to dgraham225)

Post #: 7

RE: Rear Diff - 11/19/2008 8:11:02 AM

dgraham225

Posts: 710
Joined: 9/12/2004
From: Watson, LA
Status: offline

the knuckle did that? i flipped my knuckles a long time ago because the bottom side is about 3/8" taller, so it gave me a little extra GC in the back (every bit counts, right?). Its hard to beleive that the knuckle was causing your diff to heat up and the axle come out..

_____________________________

Danny Graham

08 RZR, snorkeled, 32" silverbacks, ITP ss212's, 1" spacers, 2" prolift, HL springs

02 Prairie 650, let the mods begin!

(in reply to chris3man)

Post #: 8