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Old 06-30-2014, 08:25 PM   #99
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Originally Posted by TG Twinkie View Post
Older trailers and vehicles with lug bolts (not nuts) had left hand thread on the right side of the vehicle and right hand thread on the left. The idea was, they would not unscrew whilst traveling. The head of the bolts had and "L" or "R" to ID the thread rotation.
Chrysler Imperial Wheel Lug Nuts
I've never seen LH nuts on the right side before. I have seen a L stamped on the end of a stud though. It appears LH lug nuts ended around 1970.

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Old 06-30-2014, 08:43 PM   #100
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You guys are making my head hurt with all this left hand thread/right hand thread stuff ! As I recall, both the MG sportscars I had in the 60's ( both had center lock wire wheels ) were RH thread on the left side, and opposite on the off side. The sprint cars that I worked on were the same, as was the Lola FA car.

But I'm thinking the effect was opposite on the vehicles that used conventional studs/ they were LH thread on the left side of the car. Dad had one Plymouth, and it seems like it was "backwards" to me at the time....but was a long time ago. As the saying goes, I can barely remember what I had for breakfast today....don't ask me about 40 plus years ago.....

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Old 06-30-2014, 09:45 PM   #101
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Moral of the story is that you should not use a torque wrench to loosen bolts.

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