There is a ledge/lip right at the pan, I'm guessing your tube is hanging up there.

Try twisting the tube while pushing to see if it will drop in.

Alternatively you can open the cooler line. Engine off, yes. Let it drain out, then reconnect and check the level. Repeat as necessary. If you are way overfilled, then starting it for several seconds will pump out quite a lot.

Good luck.

 

You know the pan has a drain plug?
Inserting a tubing is not going to be easy. I was using 1/8" steel cable as dipstick for some time and even the cable was giving me hard time.
On the other hand how old is your adapter? When I was replacing the adapter on high ramps and cold engine, the open hole was pretty close to the correct level.
I lost only about a cup of ATF and that is what I had to add.

 

I think I was able to suck out the fluid. I mark the tube so that it just reaches the high level mark. Tubing was quite thin - maybe 3/16 or 1/8? I think I cut the end at 45deg so it would get by any obstructions.

FORGOT TO ADD: used my mityvac extractor, but a turkey baster would also work.

(PS: I am away from home, so can't check the tubing size)

 

I have successfully used a hard plastic hose to remove ATF from the 722.6 box. It is 0.3 inches outside diameter, and goes in about 36 inches to bottom out on the pan. For a gravity drain siphon, you will need to have a hose length at least twice that to get over the fender and below the level of the pan. Note - I use a vacuum pump to accomplish the siphon.

The dipstick tube has a restriction as it goes into the transmission to allow the factory dipstick to 'hang down' in order to get an accurate ATF level. That is probably the restriction that you are up against. The tube needs to be hard (not soft clear plastic) in order to get past this restriction. The suggestion to cut a bevel is a good one, but I've been getting by without one.

Recommend doing the siphon with cold ATF. The reason is that an overfilled pan could result in "foaming" of the fluid that will be impossible to siphon. Just check to make sure that you have the minimum fluid level on a level surface with engine running and in park before you go for a drive and final level check.

Breaking the new cooler line will net you less than 1 L, unless you start the engine. Then 2 L in about 20 seconds will come out. Its messier than the siphon.

Removing the pan plug is less accurate for measuring what amount of fluid is removed as opposed to monitoring a siphon drained to a graduated container. However, if you don't have access to a vacuum pump collection device, this may be the way to go. Normally expect about 3 L to drain from the pan - more if overfilled.

Whatever way you choose - this will be an iterative process.

Best of Luck

 

i'd approach it from any line that has a connection you can take apart and drain from there. As stated above, if the engine is running, so is the pump which will force it out faster, but make sure you've got a catch container, or a bit of a mess to clean up.

the pan drain plug/bolt is another approach also, if your pan has a drain plug, however will come out too fast and be messy as well.

good luch & let us know how it goes.

 

Well THAT was a pain. It took me four hours out in the cold to siphon out the necessary amount of fluid. And it really wasn't that much.

My weapon of choice was a 10 foot long tube that was 3/16" OD. The previous posters were right, I had to bevel the edge with a pencil sharpener to make it pass the restriction at the bottom of the dipstick line.

The fluid did not gravity siphon, even though I had a long tube and had the end down at ground level. Maybe I wasn't doing it right. So, I had to suck it up by mouth, then let it drain into a bottle. Doing this at 25F was impossible since the fluid was so thick, so I had to occasionally run the car it idle. A previous poster was right, though, that if I let it get too hot (dashboard thermometer not even at 80C), the fluid would bubble and be harder to extract.

From this process I learned: At 20C (measured with an Extech thermometer), the difference between fluid not registering on the dipstick and being above the 20C max line is only 0.25 Liters. That's a surprisingly large difference on the dipstick for a small amount of fluid.

Now to get the trans up to temp to measure the 80C level. THAT's a whole different problem.