Sheared CV Roll Pins and Bolts, Whats the permanent fix? |
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Sheared CV Roll Pins and Bolts, Whats the permanent fix? |
FL000 |
Aug 12 2018, 07:42 PM
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#1
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Member Group: Members Posts: 394 Joined: 31-January 12 From: Lancaster, CA Member No.: 14,076 Region Association: Southern California |
Recently got my car back on the road and have just over 300 miles on it. Mild SBC with 901 and Renegade CV shafts. Doing a hard pull in 2nd gear Friday and sounded like something exploded under the car - instantly lost all gears. Thought for sure I grenade the differential but it was actually where the outer CV joint bolts up to the drive flange. Destroyed both roll pins, and sheared 2 bolts. See pictures below.
What caused this and how to prevent it? Trying to take road trip with the wife in a week so want to get parts ordered asap. Too much torque? Maybe the bolts came loose? Other? If all my threads are good I plan to replace the roll pins and bolts and call it good. Maybe I'll add some thread sealant for insurance. Please advise. Thanks, Josh |
Bartlett 914 |
Aug 13 2018, 07:14 AM
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#2
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
That output flange looks pretty bad. It must be replaced or at a minimum faced true. I have found that this is the biggest problem with the CV bolts coming loose. Once they have backed off, the area around the threaded holes gets pulled out a little. This creates 4 high spots where the CV mounts instead of the full face of the output flange. This prevents the CV from truly being tight against the output flange. This results in some movement causing the bolts to "walk" out.
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