99 s80 transmission fluid shock?
 

Hey there I have a question , I have a volvo S80 (one of two I own ) that has 216,000 miles on it,I have had it for some years and have not changed the trans fluid because I was told that fluid shock would kill it by a dealer tech, now, I havent had any troubles with it, but I do use the car to travel, so wanted to see what the concensus was on this , to change it or not

also , I have a turbo wistle that my other s80 does not, doesnt seem to be an issue, and I replaced the little plastic turbo to intercooler hose that was cracked, curious if any of you have come across this before.

these cars seem to have bizzare issues with stuff comming loose IE: both power steering lines had to be re tightend, ad the turbo clamps were quite loose, wondering if this is simply a product of milage?