Automatic Transmission trouble on 2002 Diamante SLE.

What is your question?

Seems to be an intermittent problem. While shifting into reverse it shifts very hard. Then Transmission light flashes between drive and neutral while in drive. It feels like transmission is not fully engaging. Plenty of fluid.

What makes this problem better or worse?

I have to shut off engine and wait a minute or two. Sometime need to repeat several times to fix the problem.

How long has your 2002 Mitsubishi Diamante had this problem?

A few weeks