I am kind of torn on if I should change my ATF fluid in my 2001 auto 3.0 e53 X5. It was changed about 4 years or so ago at 100,000 miles and now has 137,000 miles. I will probably only put 2k miles a year tops on this this thing.

Is it overkill to change it out so soon? The fluid only has 37k miles on it now. It shifts fine, but would probably shift better with some new fluid.