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Old 03-19-2007, 10:47 AM   #1 (permalink)
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Lessons about CV axle failure

This post simply to provide useful information for everyone- it is not an indictment of the owner or bragging on my behalf.

This weekend I was at Katemcy Rocks at the Lone Star Land Cruisers annual Roundup. I had just completed a rocky hill climb and was watching the rest of the group negotiate the hill when I saw an FJ Cruiser about halfway up struggling. He was trying to transition from a low ledge he was on to a higher ledge on his right, with his wheels turned hard right and his foot on the gas. I knew immediately what the likely result would be, so I chuckled and watched (and grabbed my tools). Sure enough, he mashed the gas and started bouncing... after about 3 bounces I heard the *BANG* and I proceeded down the hill.'

Lesson #1: If you are turning your wheels sharply and/or climbing an obstacle, picking a better line is often a wiser choice than pressing a bad position.

Lesson #2: If you are spinning your wheels and it starts to hop, get out of the gas and stop immediately. The second a tire spinning at 10-15 MPH gets traction, something bad usually happens.

I got down to the vehicle and discovered that the driver had no tools, no axle, nothing.

Lesson #3: Be prepared when you head out, and do not count on or expect others to take care of you. Know how to perform basic trail repairs and have the parts and special tools (in this case: CV axle, 35mm hub socket, gear oil, right & left diff seals and a means to pull & seat the seals, locktite and FIPG) to repair your own stuff. Even if you don't know how to perform basic repairs, at least have the parts and tools so that someone can help you and someone else who made the investment for themselves doesn't end up without spares because of your lack of preparation.

So, the other FJC in our group (Graham) had a spare axle. I sat down and pulled the axle out. I discovered that the axle shaft had broken just inside the differential.

Now I was posed with an interesting challenge- I could pull the other axle out and drop & separate the diff to recover the inner axle portion that was held in place with the C clip and swap in a new axle (I had FIPG & gear oil and everything with me), or I could put together a trail fix for him. Since he had (for some unknown reason) trailered his FJC to the event, we opted for a trail fix.

I proceeded to attempt disassembly of the outer joint (it is a Birfield), but could not get it apart. Before resorting to using a hacksaw on the axle, one of the trail guides called in a Jeep that had a power inverter and a grinder with a cut-off wheel and we cut the cage to release the balls and separate the outer stub.

Lesson #4: If you have a stupid "anti-whatever" sticker (Jeeps, Hummers, whatever), take it off. If you have a stupid "anti-whatever" attitude (Jeeps, Hummers, whatever), grow up and lose it.

Lesson #5: If things take a serious turn for the worse, inventory all possible resources at your disposal and communicate with everyone where you are at and what you need.

One of the FJC Trail team members was getting frustrated at the time it was taking and told me to simply put it back together. He even called a "technician" somewhere who told him to try and run it with nothing supporting the bearing. I explained to the driver why I was doing what I was doing and left it up to him- he opted to permit me to continue. After the cage was cut and the outer stub was put back in and everything was ready to wheel him off the trail, a Toyota master technician called back the FJC Trail Team member and told him the repair I performed was exactly correct.

Lesson #6: The driver has the ultimate responsibility for approving the repairs done on his vehicle. The driver should also understand that if he wants the vehicle fixed he needs to let people who know how do it, and likewise understand that they are helping him at their inconvenience. This means that you ask questions and be informed, but do not be bossy. Also, do not let others pressure you into making decisions you feel may not be the best.

Lessons #7 & #8: Do not let impatience cause you to search for an answer that you want to hear, and if you know what is the right thing (not the easiest), then do it.

I could have easily just stuck it all together and said "What the hell- it's not mine, he wasn't prepared, it's f***d anyways, whatever", but that wouldn't have been right. He was a nice guy, and he will be a better wheeler because of the experience he went through.

So please, before you blast out to wheel your vehicle, please take the time to read and understand all you can; not only about the correct techniques of off-road driving, but the likely failures and what you need to do to prepare for them. You do not have to have a Snap-On box full of tools and parts, but simply a basic understanding of how to make a vehicle safely drive off the trail and back to camp and the capacity to perform those repairs.

Lesson #9: Beer or food is an acceptable (and expected) expression of gratitude... don't be a bogart.

Final Lesson: Don't judge someone by their "forum persona".
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Old 03-19-2007, 10:59 AM   #2 (permalink)
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Re: Lessons about CV axle failure

I do very much like lesson 4. When you need help or want to help someone else, it's not about the vehicle, it's about you and your mind set. If you think your vehicle is so perfect that it won't have a problem, think again. It's pretty hard to ask for help from a jeeper when your fJ is broken down and you have a little boy pissing on jeep decal. Nice work Valkyrie
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Old 03-19-2007, 11:02 AM   #3 (permalink)
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Re: Lessons about CV axle failure

Lesson #10:

Read Valkyrie's 9 lessons (and other insertions) at least TEN TIMES -- And LEARN THEM -- before your next off-road excursion.

Good stuff Valk.

BTW, did the driver break a front or rear axle ?? Just curious.

S.
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Old 03-19-2007, 11:06 AM   #4 (permalink)
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Re: Lessons about CV axle failure

Good points.

Quote:
Valkyrie previously said: View Post
Lesson #2: If you are spinning your wheels and it starts to hop, get out of the gas and stop immediately. The second a tire spinning at 10-15 MPH gets traction, something bad usually happens.
I tried to climb a ledge at Gilmer this weekend and started hopping pretty good. I stopped, picked a different line and went right up.

Quote:
Valkyrie previously said: View Post
I got down to the vehicle and discovered that the driver had no tools, no axle, nothing.
We had to do some minor trail repair on a vehicle. All it took was a basic set of tools (wrenches, hammer and screwdriver) that most people already have in their garage.

He was lucky to have someone like you (and Graham) on the trail with him.
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Old 03-19-2007, 11:11 AM   #5 (permalink)
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Re: Lessons about CV axle failure

Quote:
Spike Strip previously said: View Post
BTW, did the driver break a front or rear axle ?? Just curious.

S.
A CV axle is the front.
Quote:
Blackened Voodoo previously said: View Post
We had to do some minor trail repair on a vehicle. All it took was a basic set of tools (wrenches, hammer and screwdriver) that most people already have in their garage.
Exactly- there are not many tools required that would be considered "exotic", with the axle nut socket being an exception. Parts, fluids, seals and various "shop supplies" also should be carried.
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Old 03-19-2007, 11:16 AM   #6 (permalink)
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Re: Lessons about CV axle failure

Great lessons for all the newer off-roaders, thanks Valkyrie. I wish I had half the mechanical expertise you do.
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Old 03-19-2007, 11:18 AM   #7 (permalink)
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Re: Lessons about CV axle failure

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A CV axle is the front.
D'oh !!!
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Old 03-19-2007, 11:18 AM   #8 (permalink)
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Re: Lessons about CV axle failure

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I wish I had half the mechanical expertise you do.
LOL! Thanks... sometimes so do I.

No one is immune for damage or stupidity. Here is the result of some hapless fool who was backing out of a crevice he shouldn't have been in the first place, with the wheels turned sharply and the front locker engaged.

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Last edited by Valkyrie : 03-19-2007 at 11:22 AM.
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Old 03-19-2007, 11:21 AM   #9 (permalink)
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Re: Lessons about CV axle failure

Ok for that we will remove the old splintered part in your signature.
Good job Valk.
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Old 03-19-2007, 11:24 AM   #10 (permalink)
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Re: Lessons about CV axle failure

Great post.

One of my fears of so many noobs who don't even do their own wrenching
is causing delays on the trail.

If your gonna wheel your junk you should know how to fix it.
Nothing wrong with not knowing everything, but you should have some knowledge.
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