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      09-18-2020, 10:00 AM   #10
SonnyJack
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Drives: '09 E92 M3/'26 C8 ZO6
Join Date: May 2010
Location: Laurel, MD

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Quote:
Originally Posted by pbonsalb View Post
I don’t think over torquing the rear of the drive shaft would cause the rear flange to snap off. You probably need to be more clear about what broke and where. It’s a CV joint at the rear. There is a picture of one halfway down this thread. https://www.m3post.com/forums/showthread.php?t=133201
I assume you mean where the CV assembly is inserted into and bonded to the carbon fiber shaft. MFactory has said that a small percentage of its first version shafts suffered bonding issues and that its second version improves the bonding.

Were you doing dragstrip launches on R compound tires? Could the CF shaft have rubbed on anything in that area? Rubbing will destroy a CF shaft.
No launching of any kind, just tracking on either PSC2's or R7's. Was on the R7's at the time. There was no signs of rubbing. At least none that have been reported to me so far. I was under the car for a variety of reasons and always checked how things looked and never noticed anything was amiss. Apologies for my explanation of the driveshaft. Yes, the breakage was apparently at the flange where the driveshaft connects to the CV joint. Still waiting on the pictures.

I'm still thinking something else has also been going on because of the 5th gear hesitation I was having under acceleration. It was maddening and seemed as though something was slipping. Every gear pulled hard up to redline but then 5th gear would stutter for several seconds before accelerating.
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