We are about to change the tranny fluid on my dads Prado.
Its a '98 model, and I presume its running Dexron 3 (good assumption? whatever it had from factory anyway, A340F I think)
Anyhoo, we are going to put Type IV in it.
Is it ok to mix Dexron 3 and Type IV?
Obivously we are going to drain the pan, fill it up, drive for a bit, repeat until we run out of fluid.
How much should I buy? 8L? 12L?
When should I put the new filter on? On the last change or the first?
We don't mind doing this, but would we be better off to get an auto transmission place to do it for us?