jschaefer7406 Posted January 16, 2009 Report Share Posted January 16, 2009 Hello everyone, How common is this bevel gear coupler spline failure I've read so much about? Most of what I've read pertained to the R models, but the sleeve is the same for the other AWD models as well. In any case, my S70 made several clunks tonight and then a whirring sound as vehicle speed increased. This was backing out of a parking stall at Wal-Mart; no hard driving or anything like that. No AWD now (obviously). What are my odds that it's just the sleeve? Noise is near the bevel gear for sure, but not sure if it's internal or just a wiped out sleeve. Will try to get the angle gear out this weekend to be sure, just hoping for some early insight. Any help is greatly appreciated.Thanks,JoeP.S. - FWIW, all four tires have always been the same, bevel gear was resealed 2 years ago with fresh fluid; been dry externally since. Link to comment Share on other sites More sharing options...
Chilled man Posted January 16, 2009 Report Share Posted January 16, 2009 :lol: wasnt there a thread just a day or so ago about no faliures in 5 years .........and its comon , that and the angle gear die on the stock system all the time and whole lot on the P2 R Link to comment Share on other sites More sharing options...
jschaefer7406 Posted January 16, 2009 Author Report Share Posted January 16, 2009 wasnt there a thread just a day or so ago about no faliures in 5 years .........and its comon , that and the angle gear die on the stock system all the time and whole lot on the P2 RJustin,You bastard, had to bring that up didn't you? That's how it works I guess. 5 years at the dealer, never saw a failure (believe that or not ). Those people also beat the tar out of their cars (all of those angle gears leaked like a sieve too). That's what I get for disassembling mine two years back, completely cleaning it and resealing it. I also baby my car. I personally think the sleeve is just wiped out of mine. Just wanted some early insight as to how common it is though.Thanks,Joe Link to comment Share on other sites More sharing options...
dmelviØØ7 Posted January 16, 2009 Report Share Posted January 16, 2009 I saw it twice today at work :( Link to comment Share on other sites More sharing options...
jschaefer7406 Posted January 16, 2009 Author Report Share Posted January 16, 2009 I saw it twice today at work Hello,What's that, coupler failure? From what I've read it's fairly common, so hopefully that's all that is wrong with mine...Thanks,Joe Link to comment Share on other sites More sharing options...
MrWinkey Posted January 17, 2009 Report Share Posted January 17, 2009 Hello everyone, How common is this bevel gear coupler spline failure I've read so much about?External splines??? I have never seen that! Link to comment Share on other sites More sharing options...
jschaefer7406 Posted January 17, 2009 Author Report Share Posted January 17, 2009 External splines??? I have never seen that!Hello,Did I miss something? What have you never seen? I'm referring to the internal splines of the sleeve...Joe Link to comment Share on other sites More sharing options...
volvo-tech Posted January 17, 2009 Report Share Posted January 17, 2009 The sleeve is not that common on that vehicle... Were all the tires put on at the same time? That i mean by that, is you had four tires on for 15k miles and got a flat one time and replaced the tire with the same tire. If so the new tire is bigger in rounding circumference. This will take out the angle gear in miles.. Link to comment Share on other sites More sharing options...
jschaefer7406 Posted January 17, 2009 Author Report Share Posted January 17, 2009 The sleeve is not that common on that vehicle... Were all the tires put on at the same time? That i mean by that, is you had four tires on for 15k miles and got a flat one time and replaced the tire with the same tire. If so the new tire is bigger in rounding circumference. This will take out the angle gear in miles..Hello,Thanks for the insight. All four tires have been on the car for 60k miles or so. To reiterate, the angle gear was removed, completely disassembled, cleaned until sterile and resealed (oil seals, newer style vent tube, sealed case halves). Hasn't leaked a drop since then. Also had fresh Volvo oil obviously. That was two years ago (around 90k miles). Car has 123,500 on it now. I always baby the car, never beat it or launch hard ever. Hell, it did this while backing out of a parking stall at Wal-Mart. Sounds to me like the sleeve, but I'm asking because some may have more experience with it that I do. Not to sound dumb, but in working 5 years as a Master tech, I have never run into any AWD failures with a viscous-type Volvo system. Only problems I ever saw were with Haldex cars. With the symptoms described in the first post, what is your thought on the culprit? Thanks,Joe Link to comment Share on other sites More sharing options...
Chilled man Posted January 17, 2009 Report Share Posted January 17, 2009 Only thing I have seen with the non haldex are the angle gear itself eating itself alive and the coupler with busted teeth other then that , just alot leaking bevel gears Link to comment Share on other sites More sharing options...
jschaefer7406 Posted January 17, 2009 Author Report Share Posted January 17, 2009 Only thing I have seen with the non haldex are the angle gear itself eating itself alive and the coupler with busted teeth other then that , just alot leaking bevel gearsJustin,I agree with that. The only thing I have seen is that they leak like a sieve. Never seen one break, just leak. Even if they run dry and self-destruct, mine surely hasn't lost any lube. Have you seen the coupler fail on any earlier LPT AWD cars like this? Most of what I read was pertaining to the P2 R models, but it's likely the same part (or very similar). Any further insight? How many couplers have you seen fail?Thanks,Joe Link to comment Share on other sites More sharing options...
Keaton85 Posted January 17, 2009 Report Share Posted January 17, 2009 haha Justin got to you before I could. Funny thing is that him and I were talking about the 5-year streak the same day you PMed me What it comes down to is you just need to pull the BG and see for yourself... Ive seen them go and they are a cheap part to replace so have the part on hand when you get it apart IF it's the issue. You just better how that the splines on the BG arnt bad!!Trust me when I say these systems are scary to deal with. Ive seen so many viscous couplers fail, bevel gears explode, sleeves stripped, unbalanced drive shafts, toasted center bearings and torn propeller boots! Go look at the A4 systems, that is how it should have been done! Link to comment Share on other sites More sharing options...
jschaefer7406 Posted January 17, 2009 Author Report Share Posted January 17, 2009 haha Justin got to you before I could. Funny thing is that him and I were talking about the 5-year streak the same day you PMed me What it comes down to is you just need to pull the BG and see for yourself... Ive seen them go and they are a cheap part to replace so have the part on hand when you get it apart IF it's the issue. You just better how that the splines on the BG arnt bad!!Trust me when I say these systems are scary to deal with. Ive seen so many viscous couplers fail, bevel gears explode, sleeves stripped, unbalanced drive shafts, toasted center bearings and torn propeller boots! Go look at the A4 systems, that is how it should have been done!Hello,Thans for the reply. Good news is that the prop shaft is less than a year old, so the carrier and u-joint should be good for a while . I know the only sure way to tell is to pull the bevel gear. I plan to ASAP. It's just trying to find somewhere to do it thats difficult (business is so slow that I've been laid off, so I can't do it at work). Anyway, I agree. I'll just get a sleeve and seals ordered and hope for the best when I remove it.Thanks,Joe Link to comment Share on other sites More sharing options...
volvo-tech Posted January 17, 2009 Report Share Posted January 17, 2009 If you think the sleeve is bad, put the vehicle on four jack stands and start the vehicle. Then put it in drive and see if all four wheel will spin. If they all spin it is not the sleeve. Link to comment Share on other sites More sharing options...
jschaefer7406 Posted January 17, 2009 Author Report Share Posted January 17, 2009 If you think the sleeve is bad, put the vehicle on four jack stands and start the vehicle. Then put it in drive and see if all four wheel will spin. If they all spin it is not the sleeve.Hello again,Thanks for the additional help. I know the whirring noise is originating around the bevel gear area, so I'm confident it's not in the viscous clutch. Wouldn't that test result be the same if it were the sleeve or the bevel gear? I'm certain it's one or the other that's failed me, just hoping it's the former and not the latter . Not trying to argue, as you seem to know more about it that I. Just curious...Thanks,JoeP.S. - I'm not asking anyone to diagnose this over the internet. I know I'll need to pull the angle gear to be sure what failed. Just looking for early insight as to how often these things go bad. Link to comment Share on other sites More sharing options...
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