Car is driven by 25 year grandson so I have few additional details. It seems this has occurred before and then returned to normal, but this time it has not fixed itself.
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1992 Volvo 960
Question: 1995 Volvo 960 auto trans will niot shift out of 1st gear.
Answer #1FixMyCarFast.com from AB Mechanical - Fix My Car Fast.com mobile repair, July 03, 2011, 20:23Enthusiast
My understanding of this vehicle is that this is a limp home condition. Usually brought on by a mechanical failure inside the transmission. Several possibilities are a failed shift solenoid, low fluid level, low pump pressure or failed clutch pack. I believe there are three inside your transmission. The other possibility is a faulty vehicle speed sensor. In which case would cause a check engine light to illuminate. We have the ability to properly diagnose your issue at our shop In temecula. We will be open on Tuesday July 5th. My # is 951-210-0762 or look us up on line at fixmycarfast.com .
Hope this helped.