After starting and putting into reverse jumps into gear and overdrive light flashes.idle rough

What is your question?

After putting into reverse.truck hesitates then jumps into reverse .engine idles rough and overdrive light flashes until you shut it off .Then restart and light goes off and idles smooth.

What makes this problem better or worse?

Only on startup after it sits overight

How long has your 1997 Ford Ranger had this problem?

A couple weeks