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What size u-joint bolt

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Old May 27, 2010 | 09:30 PM
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Default What size u-joint bolt

what size is the little 12 point bolts holding the u-joint straps on the half shafts? I don't have anything that small and I need to know what to buy.

thanks
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Old May 28, 2010 | 01:11 AM
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I think it's a 5/16. The socket I have is a special socket and I don't think it has a size on it but I will look in the morning and see if a 5/16 12 point will fit one of the bolts.
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Old May 28, 2010 | 07:07 AM
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Correction , sorry , its a 1/4" - 12 point . When they went to the aluminum batwing they used several different bolts with varying heads including a torx on some models. The tiny 1/4" ones are pretty easy to round the heads on if your socket isn't sitting square on the head. Clean the 12 point head so the socket sits all the way inside the socket. Go Slow !

Note - The socket I prefer is an Apex 3108-D 1/4 .... the recommended socket is an Apex FC 108K 1/4
the recommended socket is 3/8 drive and has a larger OD but IMO doesn't fit down on the head very well.
my favorite is 1/4" drive and has a scary small OD-it fits perfectly but I doubt it would take careless abuse. I use it very carefully and so far (knock on wood) I haven't broken one yet.
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Old May 28, 2010 | 09:48 AM
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very well explained Roger.
Be careful when reinstalling them. when i Completed my rebuild I snapped the head off one of those little bolts. And of course it had to be the last one. so out it came again. not much fun.
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Old May 28, 2010 | 10:25 AM
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Originally Posted by larryg3
very well explained Roger.
Be careful when reinstalling them. when i Completed my rebuild I snapped the head off one of those little bolts. And of course it had to be the last one. so out it came again. not much fun.
Thanks...probably another reason I feel better using the 1/4" "drive" socket over the larger 3/8 drive.
edit-here is a pic of the 2,the 1/4 drive is the small one.

Last edited by ...Roger...; May 28, 2010 at 10:57 AM.
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Old May 28, 2010 | 11:40 AM
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Default Thank you

thanks so much for the info. Now I am 6" 250 lbs, can you tell me where to get some small hands to reach up in there lol?
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Old May 28, 2010 | 12:54 PM
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Originally Posted by dburgjohn
thanks so much for the info. Now I am 6" 250 lbs, can you tell me where to get some small hands to reach up in there lol?
Does yours have the plastic cone around the halfshaft ? PITA but helps with washout of the u-joints.
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Old May 28, 2010 | 04:45 PM
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if it ever did, it left before I owned this one

Originally Posted by ...Roger...
Does yours have the plastic cone around the halfshaft ? PITA but helps with washout of the u-joints.
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Old May 28, 2010 | 05:34 PM
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If you want to get rid of the 12 point 1/4 head you can replace it with a 6 point 5/16 hex head. GM # 14047768

Last edited by ...Roger...; May 28, 2010 at 08:31 PM. Reason: add picture
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Old May 28, 2010 | 07:33 PM
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Originally Posted by ...Roger...
Thanks...probably another reason I feel better using the 1/4" "drive" socket over the larger 3/8 drive.
edit-here is a pic of the 2,the 1/4 drive is the small one.
Wonderful, just wonderful....

Now we're to the point of posting pictures of the size of our "tools".


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Old May 30, 2010 | 12:43 AM
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Default finally off

Got the half shafts off, man those little bolts were a pain. Man those replacement bolts are expensive. Best price I found is $2.50 apeace. Just seems high for one small bolt
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Old Jun 1, 2010 | 10:51 AM
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Default found them

four bolts and two new straps for $5.19 at Advance Auto parts (part # 1-0022). Next best price was Corvette Central at 9.95 a set (straps and bolts).

http://shop.advanceautoparts.com/web...S_634033640___

http://www.parts123.com/parts123/yb....Z5Z5Z50000050G
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