I have a 90 Corolla with a 4AF engine. Need to change fluid but unsure
about the following things:

What is the difference between normal transmission fluid and final drive
fluid????

Where are the drain plugs for both fluids and the methods of refill????

I have the Haynes manual but it only shows for manual trans.

What mileage should these be changed at????

My dealer told me ‘never’ as it is a sealed unit…..but I don’t agree.

Any help would be appreciated.

Thanks
—
Farhan