I've seen OEM ones crack also FTM. Freddie's fix is the way to go. Relieve the center out about 0.005 to 0.010 and leave about a 1/4" clamp area margin around the perimeter. You can sometimes hear a cracked one. It will click sometimes.
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70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior
Owned since 1978 - First Car
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