I blame the mechanic, he blames me!

I have a 2007 Audi A4 and about 5 weeks ago had both front cv axels replaced. About a week ago they start creaking, cracking, popping all that so I call the mechanic up and he tells me to bring it in. He puts it on the lift and the left axels is just torn all apart and the internals were wearing down, the right side had a small gash and both axels had all the grease everywhere. He’s trying to make it seem like it’s something I did somehow asking me if I’d hit a curb or if I’ve been slamming it in park while moving, just all around stupid questions. Then he asks if I have any beef with someone because they might have slashed my cv axels which is in my opinion a stupid thing to come up with. Anyways he ordered me new axles but I want to know what he did wrong to cause this. I guess they could have just been defective but the chances of both being defective is small.

WOW, I can not imagine how that would happen.

I can see the splines on the axle that should be inserted into the hub.



The work wasn’t done properly the first time. Ask them to fix their mistake. Cutting the boot won’t make the axle come out of the hub.

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If you look at this picture you can see a small cut in the boot where I circled. The rest is just indented from the mechanic pushing it. Was this going to end up like the other one?

it looks like you ran over something that tore the boot. IMO, you should contact your auto insurer and see if they will cover it. That’s what you pay them for.

Are you buying remans, aftermarket new or Audi new? Most remans I’ve had only lasted 5 months to a year. I’ve had good luck with aftermarket units made in China but others have not. You can’t go wrong with factory new but they do cost more, a lot more.

Eventually, yes.

I’m not really sure what the mechanic put on it I’ll have to ask him. I believe aftermarket new. I don’t think the problem was the axel but rather his installation job.

The cv axel is covered under a warranty because they are only 5 weeks old. They will be replaced tomorrow. But I don’t think I hit anything to cause this. Something inside the axel caused the damage

See @Tester comment above. If the splines weren’t inserted all the way in the hub, obviously the axle would be too compressed when driving and turning. Did the axle bolt come off? Was it a new one instead of the old one? Was it tightened to pull the spline all the way through the hub? I’ve only done a few but I read the directions. Certainly to me looks like a hack job.

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The appearance of the splines on the axle shaft is normal, the axle shaft is connected to the inner race of the CV joint. If the axle shaft passed though the hub you wouldn’t be able to steer, only go straight, there needs to be a joint at the hub.

It’s a pretty common here for folks buying half-shafts (cv axles) to be given the wrong part number at the parts store. There can be a half-dozen different part numbers to choose from for the same make/model/year of vehicle. Which ones fit your car depends on the transmission, possibly the engine, 2wd vs awd, among other factors and options. When I’ve installed front cv axles – I’m just a driveway diy’er, no expert — but once the splines start going into the hub, they’ve always gone in the whole way without further complaint. They just slip right into the center of the hub.

I’d be surprised if the splines would get stuck part way if the part number was correct. I’m guessing that the wrong part numbers for the axles got installed.

The OP presumably has driven this car for a long time without their driving damaging the original CV boots, so it seems unlikely the OP’s driving damaged both of the replacement in 5 weeks. OP , suggest to ask your shop to double and triple check the half-shaft part numbers before trying this again.

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I will do that, thank you guys

I was probably unclear. It’s been a few years but the outer joint has the splined shaft that goes through the hub. The other shaft goes between the two joints. The hub turns with the wheel as the outer joint allows. Then could have just been a faulty joint.

The splines on the axle shaft means that the outer CV joint is probably replaceable.

I installed a rebuilt axle and with practically zero miles and two years I saw a tear right on the top of the ridge. Could be a rodent snacked on the boot? Could be the whole thing is some form of soybean. There are boots and then there are boots. I have seen CV boots at the junkyard that looked like they were built for the Russian winter. Probably 2 mpg just to turn them.
You should put your efforts to acquiring best quality boots next time. In my opinion the boots we are getting are far from OEM.

I guess the question that we don’t know is if it is just the boot or the joint that ruined the boot. From my little experience though, the only time I’ve had a boot that destroyed was when the joint itself failed.

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from the looks of the CV axle on another side, mechanic was using brute force when putting them in

great they will replace it for OP under warranty, but I would go and review the result of their work right after getting car back… although I can imagine they will not beat it so badly the second time