Steel threads into aluminum usually has the opposite problem of corroding stuck. But, wouldn't hurt to add jam nuts on the rear, and even Loctite them. I have bins of nuts so would done so faster than it takes to ask, if worried.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans