If you're reading this, you are probably an admirer of Chrysler Corp; its proud history and its products. Part of Chrysler's tradition has been it's "out-of-the box" thinking when it came to innovation and engineering.
From 1937 to 1972, Chrysler vehicles had RH thread lug bolts/nut on the passenger-side and LH threads on the driver-side. The idea was that the car would tighten its own wheel lugs as it rolled down the road. At the time, tire/brake service personel were aware of this so it wasn't a problem. In the 21st century, its likely that the person about to put an air wrench to your wheels wasn't even born when your car was built and is totaly unaware of this "design feature". It always a good idea to remind anyone servicing your car that the LH lugs are LH thread.
After extensive research, Chrysler's engineers discovered that the wheels of Ford and GM cars were not falling off even though they had RH thread lug nuts all around and so, starting in 1973 Chrysler switched their driver-side wheel lugs to RH thread.
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