1995 Ford E-Series Van

Transmission problem
1995 Ford E-Series Van V8 Two Wheel Drive Automatic 118000 miles

My trouble is it won't shrift right. I can shrift from 1st to 2nd manually, but to get to high or overdrive I have to be going around 70 mph. I also get check engine light sometimes. Want to know possible causes. Thank you for your help.
December 18, 2007.

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