IJM

I just completed the third drain and fill (driving about 100 miles between each time) to replace the fluid in my AW4 automatic. I think I added about a quarter to half a quart too much fluid (I'm using Dex/Merc III) on the last refil, and it's showing a bit above the MAX line on the dipstick.

Here's a pic of my dipstick showing where the fluid comes up to. I checked it hot and running in neutral. The fluid mark was right about where the black arrow is, and the acceptable range appears to be where I drew the horizontal line.

Is this close enough not to fuss over, or should I loosen the drain plug a bit to bring it back down to the MAX line?

autosurgeon

Bring it down to the max line when at operating temperature. Too full and the planetary gears will aerate the fluid which will make it not shift correctly and could shorten the life of the trans.

Turbo X_J

If over filled it can puke out the fill tube, hit the exhaust, and then well...

autosurgeon

Flash fire...nasty

Fred/N0AZZ

Yes drain to full mark, then fill slowly next time till its where it needs to be.

crabmushrooms5

So I could have caught fire when I was doing 55 and one of the trans line blew?

SteveMongr

Yes, overfilled OR overheated, once it pukes, bail out and get upwind.

IJM

Ain't nobody got time fo dat!

Thanks everyone for the advice. I'll drain it a bit when I get back from Watkins Glen this weekend (not taking the XJ, obviously).

Roler

Just keep in mind that it only takes 500 ml (about a pint IIRC) to go from the add line to max line.

IJM

Yeah, I just drained out about 8 oz. and it dropped about 1/3 in. on the dipstick.

Fred/N0AZZ

Hell don't feel bad we have all done it at one time or another on the oil or trans fluid, know that I have for sure more than once in the last 50 yrs I have been working on cars.

Roler

I got it back from the shop once and had to drain almost 2 pints (!) from the ATF to get it normal on the dipstick. It was soon after, that I decided to start doing that stuff myself....After all, paying someone to overfill all my fluids, was something I could easily do myself lol.
I came to learn, that the only way to make sure things are done correctly, is by doing them yourself. Even if it means you f-up a bit every now and then...no worries.