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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 08-12-2011, 10:28 PM   #1
Turbobitt
 
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Has anyone broke driveshaft bolts ?

I was pulling out aof a parking lot today and heard a clunk and the sound of parts falling out of the back of the car. Thought I drove over something at first. I continued driving and noticed a vibration. When I got home and inspected the rear, I found one of the 3 flange bolts missing with a piece still threaded into the rear flange. I was able to unthread the stub with my fingers. I also drove back(with my other car) and found the rest of the bolt.

Has anyone broke one of these before ? Where can I get a replacement ?

Allan G.
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Old 08-12-2011, 10:55 PM   #2
SamHouseIII
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Not here, but wondering if you had done a burnout or rompped it pulling out,maybe to much torque? Was it a used car? if so then they may have done it before, normally these stand up to the abuse one can give, lucky not more damage was done than the bolts breaking.
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Old 08-12-2011, 11:03 PM   #3
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NO! i hope this doesn't happen!
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Old 08-13-2011, 08:50 AM   #4
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Yes, do you search on here.
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Old 08-13-2011, 08:51 AM   #5
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A guy in our club just had this happen a short time ago.
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Old 08-13-2011, 09:17 AM   #6
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I bent 3 sets of bolts. Then I got smart and changed out the driveshaft to a 3.5" Driveshaft Shop one piece aluminum one. No more worries now.

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Old 08-15-2011, 01:05 PM   #7
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Quote:
Originally Posted by Turbobitt View Post
I was pulling out of a parking lot today and heard a clunk and the sound of parts falling out of the back of the car. Thought I drove over something at first. I continued driving and noticed a vibration. When I got home and inspected the rear, I found one of the 3 flange bolts missing with a piece still threaded into the rear flange. I was able to unthread the stub with my fingers. I also drove back(with my other car) and found the rest of the bolt.

Has anyone broke one of these before ? Where can I get a replacement ?

Allan G.
You should be able to get a full set of these bolts from your dealership. If you need part numbers just message me and I'll do my best to find them for you. I hope that helps.

Jeff Morris, Chevrolet Customer Service
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Old 08-15-2011, 03:19 PM   #8
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I threw one bolt a few months ago on my 2010 SS. I heard it hit the underside and felt the vibrations through the shifter stick after that. I bought 4 nut/bolt sets from the dealer and installed just 1 set so I have a full set of 3 as spares just in case. So far so good. Don't let anyone "retorque" your drive shaft bolts!

I would advise getting your hands on an old school beam type torque wrench to do the install. These are single use "torque to yield" fasteners. You can watch them come up to final torque values if you use the beam type wrench. Easy to do if you take your time and do it right.

-Mark.
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Old 08-16-2011, 06:43 AM   #9
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Quote:
Originally Posted by Chevrolet Customer Svc View Post
You should be able to get a full set of these bolts from your dealership. If you need part numbers just message me and I'll do my best to find them for you. I hope that helps.

Jeff Morris, Chevrolet Customer Service
Thanks for your offer. I did a search last weekend and found the part numbers and ordered them through GM parts direct. I wasn't expecting the dealer to just hand over a new set without having the car. I don't have much confidence in these bolts since it appears to be a common failure. My guess is that this failure is a result of hydrogen embrittlement due to plating or acid cleaning. Was hoping for someone to have a more
permanent solutuon.

http://en.wikipedia.org/wiki/Hydrogen_embrittlement


Allan G.
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Old 08-16-2011, 11:11 AM   #10
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VERY COMMON ON THESE CARS...I BROKE FRONT AND REAR..DONT LET THE BACK ONES BREAK OR THEY WILL **** UP YOUR SHIELD AND ITS ATTACHED TO YOUR GAS TANK BIG HEADACHE....MIGHT AS WELL BUILD A ONE PIECE DS. WITH YOKE...THIS DESIGN PISSES ME OFF....BUT THE GOOD THING IS LIKE ON A HARD LAUNCH ID RATHER BREAK THESE THEN THE AXLES....
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Old 08-16-2011, 11:13 AM   #11
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Quote:
Originally Posted by Stingr69 View Post
I threw one bolt a few months ago on my 2010 SS. I heard it hit the underside and felt the vibrations through the shifter stick after that. I bought 4 nut/bolt sets from the dealer and installed just 1 set so I have a full set of 3 as spares just in case. So far so good. Don't let anyone "retorque" your drive shaft bolts!

I would advise getting your hands on an old school beam type torque wrench to do the install. These are single use "torque to yield" fasteners. You can watch them come up to final torque values if you use the beam type wrench. Easy to do if you take your time and do it right.

-Mark.

THREADLOCK ..AND A "WISE" HAND TORQUE...YOUR NOT BUILDING AN ENGINE HERE OR INSTALLING STUDS...LOL SORRY MAN IM SURE YOU BELEIVE IN YOUR THEORIES IM NOT TALKING SHIT....BUT GEEZ
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Old 08-16-2011, 11:36 AM   #12
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THREADLOCK ..AND A "WISE" HAND TORQUE...YOUR NOT BUILDING AN ENGINE HERE OR INSTALLING STUDS...LOL SORRY MAN IM SURE YOU BELEIVE IN YOUR THEORIES IM NOT TALKING SHIT....BUT GEEZ
Not a theory - it's in the GM Service Manual.

-Mark.
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Old 08-16-2011, 12:15 PM   #13
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Glad to see you were able to get everything you need to take care of this yourself Turbobit. Hopefully I'll have some information on this issue soon.

Jeff Morris, Chevrolet Customer Service
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Old 08-16-2011, 01:16 PM   #14
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Glad to see you were able to get everything you need to take care of this yourself Turbobit. Hopefully I'll have some information on this issue soon.

Jeff Morris, Chevrolet Customer Service
I actually stopped at the dealer today during my lunch break. The dealer said they would replace the bolts under warranty and also said they would supply me with the bolts and let me do it myself. They just requested the old bolts back to send to GM.

This works good for me. They get the credit for doing the work, and I get a set of bolts. I'll take the ones I ordered and keep them as spares. Just wish there was an updated bolt.

Allan G.
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Old 08-16-2011, 09:00 PM   #15
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Here is another interesting update. While removing the two remaining rear bolts that didn't break, I inspected the fron and found a very loose bolt that also has a slight bend. Looks like I'll be replacing those.

Now I'm debating on replacing the rubber couplers with aftermarket, or maybe one piece shaft.

Allan G.
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Old 08-22-2011, 11:10 AM   #16
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Yup, I broke one Friday on my way home from work. Just over 13,000 miles on it.

Weirdest thing, shifted into 2nd and it started vibrating.....really bad. Got it home to check it out and pulled a broken bolt right out of the coupler.....no idea how it didn't get thrown out when it sheared or on the 4 miles I GENTLY drove it home afterwards.

If I would have known what a damn hassle it was going to be getting it towed to the dealer, I would have just taken care of it myself .
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Old 08-30-2011, 08:15 AM   #17
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It's a real common problem, we have lots of people call about bending or breaking the bolts.

Thanks
Chris
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Old 08-30-2011, 08:37 AM   #18
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Lets see some pictures!
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Old 08-30-2011, 12:41 PM   #19
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Whats the fix
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