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Half Shaft French Lock

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Old Mar 12, 2015 | 10:46 AM
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Default Half Shaft French Lock

I tried to get French locks from Corvette Central for my half shafts, but the parts are back ordered and CC reported that they don't know when any will be available.
What's the general opinion on using Locktite instead?
Any meaningful discussion would be appreciated.
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Old Mar 12, 2015 | 10:54 AM
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I don't have locktite or french locks on mine. They have not come loose. Locktite would work just fine though.
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Old Mar 12, 2015 | 11:09 AM
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Thanks REELAV8R, I appreciate the reply.
Unless someone tells me it's a screwy idea, ( ) I'll just use the locktite.
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Old Mar 12, 2015 | 11:11 AM
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I only use French locks on factory correct restorations. I use red locktite on all other builds. One trick to prevent twisting French locks.....put some anti seize under the bolt heads so they don't grab and twist the locks
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Old Mar 12, 2015 | 03:05 PM
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Thanks Solid LT1, I'm feeling more confident with the Locktite decision. The old French locks have been tossed in the can.
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Old Mar 12, 2015 | 04:55 PM
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Originally Posted by The_pakettle
I tried to get French locks from Corvette Central for my half shafts, but the parts are back ordered and CC reported that they don't know when any will be available.
What's the general opinion on using Locktite instead?
Any meaningful discussion would be appreciated.
I'm not a fan of the french locks but I too have used anti-seize on them to prevent twisting. I used to have nothing on the bolts and they were fine. Without french locks, I would use the blue locktite on lieu of red and I'd use the lock washers too. I only use red in extreme cases because heat may have to be applied to get it lose....especially if you do it like you're supposed to and clean both thread pairs with cleaner, apply to both thread pairs....it's tough stuff. Blue has been more than adequate in most cases for me.
Jim
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Old Mar 12, 2015 | 06:00 PM
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I've been using blue loctite on the half shaft bolts for 40 years - never a problem.
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Old Mar 12, 2015 | 06:20 PM
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Careful. I just had a halfshaft let go without the French locks. All because one bolt fell out. Wont do that again. Bolts had locktite on them also. My .02 See my thread about 4 months ago.
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Old Mar 12, 2015 | 07:49 PM
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Locktite and lock washers here with no issues.
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Old Mar 12, 2015 | 08:12 PM
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A "good" French lock is a good idea; but most of the aftermarket pieces are just soft steel that 'look' like the originals. When you go to torque up the bolts, the flimsy French locks just want to wind up like a cheap clock spring. Poor metal with no heat treating.

You would be better off with lock washers and Loctite, IMO.
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Old Mar 12, 2015 | 11:23 PM
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Originally Posted by The_pakettle
I tried to get French locks from Corvette Central for my half shafts, but the parts are back ordered and CC reported that they don't know when any will be available.
What's the general opinion on using Locktite instead?
Any meaningful discussion would be appreciated.
Why don't you just buy them from Paragon..?
Lars
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Old Mar 13, 2015 | 12:38 AM
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http://willcoxcorvette.com/product_i...ducts_id=27684

I should have plenty on the shelf.

Willcox
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Old Mar 13, 2015 | 08:11 AM
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Hi,
Even if the locks only cost 5 cents each originally you can be pretty sure Chevrolet wouldn't have used them if they weren't needed in those couple of locations.
Regards,
Alan
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Old Mar 13, 2015 | 09:19 AM
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Originally Posted by Willcox Corvette
http://willcoxcorvette.com/product_i...ducts_id=27684

I should have plenty on the shelf.

Willcox
If you still need them, we have a bag full according to Mike in sales. Give him a call at 800-588-3883 and he'll fix you up.
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Old Mar 13, 2015 | 10:51 AM
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Originally Posted by Alan 71
Hi,
Even if the locks only cost 5 cents each originally you can be pretty sure Chevrolet wouldn't have used them if they weren't needed in those couple of locations.
Regards,
Alan
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Old Mar 13, 2015 | 03:50 PM
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Yes. But there's were treated steel that didn't wind up when you torque the bolts.

If parts more like the originals are available, I'm not aware of it. But, give it a shot if you want. I bought some several years ago and they were cheap junk....looked like the factory parts, but metal and metallurgy nothing alike.
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Old Mar 13, 2015 | 05:12 PM
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Originally Posted by 7T1vette
Yes. But there's were treated steel that didn't wind up when you torque the bolts.

If parts more like the originals are available, I'm not aware of it. But, give it a shot if you want. I bought some several years ago and they were cheap junk....looked like the factory parts, but metal and metallurgy nothing alike.
We still carry the GM locks, but the locks we carry now and sell the most of, well they are the stainless locks.... they don't twist up.

Last edited by Willcox Corvette; Mar 15, 2015 at 12:43 AM.
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Old Mar 14, 2015 | 04:18 PM
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Super! Wish they had been around when I redid mine...
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Old Mar 14, 2015 | 07:25 PM
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I used them on mine just for the looks, also used loctite which in my opinion is a much better solution.
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Old Mar 15, 2015 | 01:22 PM
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If you have installed the French Locks and have bent the [anti-rotation] tab up for each bolt, there is no reason to use Loctite...unless you are a NASA engineer and require having redundant system reliability.
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