Q: Want to make sure this transfer case will fit my car…?
04 S60R 2.5 6 speed Manual All Wheel Drive
Do you know if this will need fluid?
Do you know if I need a seal kit to go with it?
What about a Collar sleeve service kit?

https://volvoproject.com/?product=volvo-s60r-v70r-transfer-case-angle-gear-30k-like-new-04-05-06-07-6-speed-manual

A:Yes it will fit your s60r manual transmission, yes when you receive it you need to check oil because it is usually drained for shipping, we have sold many of these and never had any issues you may replace seals if you want,

if it goes to collar sleeve all teeth are in good condition, there is nothing wrong with it,