Here are used Volvo OEM TCM computers from Volvo cars. Sadly I am learning that a lot of transmission issues with these cars is the TCM.
CAUTION, NOTICE, WARNING, NOTE, etc: Please select the TCU that matches the one that belongs in your vehicle. A TCU that does not match your vehicle may work in your car but it may cause damage if the configuration is not proper to your transmission/internal parts. It's my understanding that these transmission are the same and use the same internal solenoids, parts, but AI seems to think differently. Proceed with caution.
WARRANTY: Buy one and return it if it doesn't fix your problem. I will refund your purchase price.