Hi, I have Volvo s80 1999 2.9 Non Turbo.

Replaced Transmission on 145000 KM.

Recently done brake fluid change and unfortunately couldn't done rightly and brake switch kept on while drive.

So, I felt heavy on drive and ended up watching "Transmission, Urgent Service" Message.

Next day it starts slipping on 3 and 4 gear but If I kept RPM Less than 2000, It does not slip. Changed fluid and filter did not help. But during resting the fluid change counter, checked the solenoid and 3/4 ones were not getting on...but later on and off start on the diagnose computer.

Problem still persists, anyone can advise do I need to overhaul whole transmission or change the valve body or sensors?

Note: While fluid change there was not much gunk on the magnet or else where inside pan as I saw in my last transmission when it was failed on 145000.

Now its 190000 KM.

Will appreciate your opinions.