After nearly 15 years, I would say it's worth changing the fluids. Many cars are filled with 'Fill for life' oils when they are made, but while they are long lasting, they do break down over time. I don't know had bad a job is is on a Landcruiser, but it may well be worth doing if you want to avoid future problems. Have a look here and you can see what we have for it.
http://www.opieoils.co.uk/products-for-my-...ne-oils#resultsIf you have any problems, let me know
Cheers
Tim