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Old 03-14-2011, 03:07 PM   #1 (permalink)
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9" ring gear bolts

Seems there are more then a few cases of 9" ring gear bolts loosening and some even backing out and causing damage or ending races. Why do they loosen?
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Old 03-14-2011, 03:50 PM   #2 (permalink)
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Seems there are more then a few cases of 9" ring gear bolts loosening and some even backing out and causing damage or ending races. Why do they loosen?
because they weren't safety wired correctly?
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Old 03-14-2011, 04:23 PM   #3 (permalink)
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We have seen broken safety wire loctite and proper tq! Any other thoughts
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Old 03-14-2011, 04:25 PM   #4 (permalink)
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Most don't even safety wire them to start. A guy in our club had the fall out on jackhammer lucky no damage from it and now he has them safety wired lol lol
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Old 03-14-2011, 05:36 PM   #5 (permalink)
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I just checked mine and they were coming loose. I have heard that the safety wire just breaks. I am trying to come up with a goof fix as well.
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Old 03-14-2011, 05:37 PM   #6 (permalink)
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Quote:
Originally Posted by ZukIzzy View Post
We have seen broken safety wire loctite and proper tq! Any other thoughts
I heard,,,

I'm interested in the solution as well
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Old 03-14-2011, 05:41 PM   #7 (permalink)
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thought about welding the bolts? small tack on oppisite sides of the bolt heads. cutoff wheel to take them off.

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Old 03-14-2011, 05:56 PM   #8 (permalink)
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thought about welding the bolts? small tack on oppisite sides of the bolt heads. cutoff wheel to take them off.
Not a bad idea, I would try that if I didnt have to check my engagement collar every once and a while. May be the trick for my thirds with spools though. I know it sounds harsh, but I can remember when I was tack welding u-joint caps to hold them in, some guys still do.
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Old 03-14-2011, 06:52 PM   #9 (permalink)
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not a bad idea Derek. I've had this issue in the past too.
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Old 03-14-2011, 07:17 PM   #10 (permalink)
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I have seen one diff with T.I.G. tacks broken and the bolts loose. I was very surprised to see it. Any input on what is loosening them?

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Old 03-14-2011, 07:47 PM   #11 (permalink)
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Maybe someone needs to start making the ring gears with left-hand threaded holes? (assuming there is some force making them turn counter-clockwise)
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Old 03-14-2011, 07:50 PM   #12 (permalink)
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Quote:
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Maybe someone needs to start making the ring gears with left-hand threaded holes? (assuming there is some force making them turn counter-clockwise)

This realistically is a easy solution. Except changing the entire industry... but would work!
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Old 03-14-2011, 07:55 PM   #13 (permalink)
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There is some axle that uses LH thread ring gear bolts from the factory. I'm thinking maybe it's the Chrysler 8.25", but it's been a while since I've worked on one so I'm not certain.
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Old 03-14-2011, 09:03 PM   #14 (permalink)
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I think that the small Gm10 bolts had left hand threaded Ring gear bolts.
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Old 03-14-2011, 09:11 PM   #15 (permalink)
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For those who've had the bolts come loose is it always on the rear axle? about 5 of my bolts were loose/almost falling out after a race last year and it was in the rear third.

my next step was going to be heavy tacking the bolts to my spool in the rear. I don't think its a problem in the front.
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Old 03-14-2011, 09:22 PM   #16 (permalink)
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If the safety wire job is done right and tight no way they can come loose but what about drilling a hole in the head and put something in it to hit the third member something like the header bolts that they have now
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Old 03-14-2011, 09:50 PM   #17 (permalink)
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I saw some locks on some lugnuts of a garbage truck the other day. Bad paint sketch but something like this below. If some locks with flags were made and with the bolts torqued and clocked properly it might work. The flag keeps the bolt from turning. The problem could be keeping the lock on the bolt. Weld ??? Ringear bolts in black. Locks in green.



Or maybe one ring to fit over all the bolts = pain to install but???

Last edited by Cat037; 03-14-2011 at 09:55 PM. Reason: incomplete thought
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Old 03-14-2011, 09:52 PM   #18 (permalink)
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I have seen it happen in the front. Carrier flex and spinning is what Im calling.
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Old 03-14-2011, 09:53 PM   #19 (permalink)
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I broke the teeth off of the pinion on my front 60 at TDS. When I went to take it out, the ring gear bolts were not tight, not loose but, I was able to remove them with a wrench and holding the ring gear with my hand. I'm in the process of putting together a Jana76, so maybe heavy tacks on the Detroit?
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Old 03-14-2011, 09:56 PM   #20 (permalink)
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I am having issues with the front and rear.
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Old 03-14-2011, 10:00 PM   #21 (permalink)
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Is it only happening with certain ratios or does it not seem to matter? Maybe some kind of harmonic issue?
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Old 03-14-2011, 10:03 PM   #22 (permalink)
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Mine is a Chevy 60 with 4.88's, a Detroit, and 40" MTR's.
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Old 03-14-2011, 10:22 PM   #23 (permalink)
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From my experience it is happening front and rear. Ive seen it in desert cars and 4400s a few rock crawlers but they were get it kind of drivers. I have talked to and looked at 100 or more drag and HP street cars and they don't seem to have the issue.

Safety wire seems to be the fix but it is not working for a few, they are finding broken wire and loose bolts. It is working for at least 1 car I know of at least so far. I am looking into that one a bit more to see why it would work for him and not others.

Still wanna hear from anyone who has had the issue and details of the set up if you can. Low pinion or high, aluminum or Iron third, proper torque or just run them in to guttentight with the impact, Place bolt or grade 8 or serrated head??? any details you can.

thanks
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Old 03-14-2011, 10:36 PM   #24 (permalink)
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Just pulled the thirds on our car and both front and rear are loose. Here is our setup.

Yukon gears 6.20 "IIRC"
Bolt kit from Yukon
Yukon iron thirds
Torqued to spec with Red Locktite and thread primer
All 9" stuff with 250 miles since install. KOH and pre-running
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Old 03-14-2011, 10:40 PM   #25 (permalink)
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Wow I thought I was crazy and didn't torque them to spec when I assembled everything when this happened to me....it happened in the rear 9" in my WJ with the Strange 3rd with radial ribs, 4.56's, 35spl detroit and 36" iroks. I can't imagine I'm being nearly as hard on it as you guys, but I've broken quite a few rear driveshafts in the last couple years. Been almost a year since then I'd say, no issues since.

How meticulous is everyone being to ensure clean mating surfaces on the locker and ring gear on assembly? If there's a single piece of grit that doesn't let the ring sit perfectly, I could see things loosening up over time.

Here's a question for you guys, are you driving manuals or automatics? the issue popped up pretty soon after I swapped in the manual trans, made me wonder about the extra shock loading a manual gives.

*EDIT* Also here's a scary thought...what if the ring gear/carrier are actually getting pushed hard enough to start deflecting and flexing a little bit?
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