My 2002 V70 XC has 125,000kms and had some transmission clunks when sitting at the light, rough like the engine is missing. The other clunk is a random , similar much harder clunk when driving in 5th gear on the freeway. It is worse during the first 50 kms and seems to go after then. I could imagine that the clunk sitting at the light could be cause by the sticking solenoid in the valve body but the 5th gear problem does not make any sense.
Appreciate any comments from the transmission gurus