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Fallen Drive Axle....Why?????
The other day i was driving along and all was well with my 930.
I pulled up to a stop light, and upon engaging the clutch and applying some light throttle I heard a bang and the engine revved up to red line and bounced about 5 times off the limiter. I shut down the engine and pushed the car to a side street. What happened was my drive shaft came disconnected from the transaxle and landed on the throttle cable. I also observed that only 3 out of 6 bolts were remaining. Nothing seems to have broken so I rebolted the existing 3 back on and drove home. All seemed normal so I guess the bolts must have just come off. Whats up ??? Is this a regular occurence for these 911 cars??? What if one is driving at high speeds and these come off. Could this mean disaster??? Any Ideas |
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08-19-2003, 03:09 PM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,496
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Do a search. This has happened before to other 911 drivers. In fact here is a post on the subject just a few posts below yours! Check your CV joint bolts happens is someone either didn't replace the wavy lockwasher (it actually has some technical name) or didn't properly torque the bolts. Nevers hurts to check the bolts a week or so after you torque them and then at least annually.
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Kurt V No more Porsches, but a revolving number of motorcycles. Last edited by Rot 911; 08-19-2003 at 03:19 PM.. |
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08-19-2003, 03:12 PM
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"I understand that you want to drive fast, it's just that I want to go faster!" Move ova please  Chad aka "Chili" 1974 Base coupe in Carrera outfit. No A/C, no Sun Roof, no power windows. Fast and light, just the way I like it. (Sad to say, it's sold. But at least it remains with us on this board.) My car http://www.pelicanparts.com/gallery/CHILI 1969 RSR Project. Heavy on the word PROJECT! No pictures yet. Keeps breaking lenses of cameras. |
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08-19-2003, 03:19 PM
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Your lucky the remaining bolts didn't shear off in the trans flange. Mine did. it wasn't fun getting them out.
Now I check the torque on my CV bolts every month or so. Imagien what would happen if the axle would break free going 60mph and the damage it would cause by thrashing around under the motor and headers.
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08-19-2003, 03:28 PM
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Jerry,
Had you noticed any extra 'play' in your drivetrain of late? I can say personally that my cv's are in poor shape and need replacing as I have a little 'clunk' heard in mine when I lightly tap the throttle in gear as everything engages. Just wondering if you've had any symptoms like this prior to this happening? Ryan
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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08-19-2003, 03:57 PM
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Irrationally exuberant
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I think the loose CV bolt syndrome is more common with the pre 85.5 axles. The 85.5 and later axles has 6 10mm bolts.
-Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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08-19-2003, 04:43 PM
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No I had no noticable play in the shafts and the car responded well right up until this happened
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08-20-2003, 06:04 AM
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Registered
Join Date: Dec 1999
Location: Los Angeles
Posts: 2,479
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It's hard to tell what the difference is until you replace the cv joints. Then you'll see. I had a cv joint break into pieces just over a year ago. After I replaced it, I could tell the difference, albeit a subtle one.
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-kb- |
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08-20-2003, 06:54 AM
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Pocket Turkey Neck
1974 Porsche 911 2.9
1978 Porsche SC Targa 3.6
1974 Porsche 911 2.7
The Blue Pheonix
