Update all software when performing software upgrade on Volvo S80

Problem Description and Possible Solution
Several software related issues have been reported and it is recommended that when a software upgrade is performed, all the software should be updated
Problem Data
RepairPal Verified
Average mileage: 167,000 (167,000–167,000)
3 model years affected: 1999, 2000, 2001
5 people reported this problem
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Says trasmission service shakes..gears hard to shift..light on gears wont work, stay on P.