[Sunday Rider]

Welcome to the forum.

You don't have to do the complete tranny flush, just drain it, and fill it. It will take almost 4 quarts. But there have been various amounts here.

You can fill it with as much as you have drained, but that assumes you were at the top mark when you emptied it.

The hill presents a challenge. I guess you can see what the reading is on the hill, and then find a level place and see how much difference that makes between the two readings. That will give you a good reference point for the future.

You can do all this yourself, as long as you are organized so you are not making tons of trips up and down.

The tranny change is even easier than the oil change.

When you tighten the drain plug, try to use a new washer, this will make it easier to take out next time as well. You just need to snug it. Don't get carried away with so much force that you can't take it out next time. You will know when it is snug.

The only problem I see is the old fluid and what you do with it. You need lots of empty containers on hand, and a place where they will take it.

The costs for the services are what most dealers charge, and some are more reasonable than others. If I had to get someone else to do it, it would be an independent garage that works on Japanese cars, and someone I will take it to in the future for repairs. Second choice would be the dealer. I don't like any of the rapid oil shops, that is a gamble.

I am sure others will chime in with some good suggestions.

Good luck.