I purchased my 2002 V70XC at auction with 123,000 kms. I noticed it had a slight transmission clunk at 100kph on the freeway and when waiting at the lights. I did a transmission flush. Problem improved very slightly.
Over the next 10,000kms it got better and at about 18000kms it started to return only ever a slight clunk. Did a transmission fluid change, made sure the hot was hot, just a drain and fill. Gradually over the next
2-3000kms it got better and is now non existent. May be of interest to other owners