My 940's experience almost exactly duplicates "JetDriver". It took me about an hour to do it singlehanded, shutting off when the bubbles began to appear in the clear plastic hose, then adding about two quarts to the filler tube. It was 12qts of the Walmart Dexron before the fluid looked clean, so I did about six laps back and forth. I used 3/8 hose, and wiggled and pressed until it "threaded" onto the upper nipple from the rad. The fluid just dribbles out, there's no pressure to speak of. I drained and refilled the pan first to try to get at least some of the sediment out. Fluid was muddy-brown!

On the final fill, once you feel you have flushed adequately, fill only to the lowest mark on the stick, then warm the engine up and run through the gears. Fill again to the low mark if nec. and drive the car until full hot, and fill to the correct mark. As mentioned, the level is quite sensitive to trans temperature.

If you change frequently (30,000mi?) and don't have extreme (hot/cold/towing) conditions, ordinary ATF is good enough. If you want that little extra margin, go for the synthetic.
--
Bob (81-244GL B21F, 83-244DL B23F, 94-940Sedan B230F)

As you can see from the responses, the ATF flush is very easy. I found that with the engine running in idle, it pumps out the fluid a little faster than I could put it in, using a funnel. My fluid change was a family operation. My wife manned the out hose and counted the quarts in pre marked milk jugs. I did the fill, trying to keep up. I had to stop the engine a few times to catch up. I did a gear shift through too while flushing and ended up using 10 quarts.

I bought a length of 3/8" clear hose from Home Depot. The 3/8" was a little too small so I heated the end over the stove while wedging a center punch inside to enlarge it a little. I got a good tight fit.

Synthetic tranny fluid supposedly lends itself to the longevity of the transmission. Great for keepers. If you go the synthetic route than expect to pay close to $5/qt, for Mobil 1 AFT, that is. The most important thing, as mentioned previously, is to change the AFT on a regular basis.
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Tom F '95 945, lein holder on a '95-944Ti, & RIP '78-245

Don't waste money on their hose. Just use the clear vinyl (aquarium) hose and mount to the top radiator outlet. I used four gallons of wal-mart dexron for the flush at a cost of 14 us. I did drain the pan first which was easy and added about 2.25 quarts. My wife started the car and I had her run through the gears waiting for 2 quarts of fluid to come out to fill a market gallon jug. Drain 2 quarts and add 2 quarts until you get bright red fluid. Drive around after correcting the level for about 2 - 500 miles then do the same flush with mobil one sythetic trans fluid. This time just use the 8 quarts of fluid. 40us and you've got a great flush. Mine was quite black when I did this. The trans has stopped "hunting" for a different gear at moderate speeds now. Good Luck.
--
92 244 lowered, Bilsteins, IPD sways, Unitek cam/header, TSW Revo 18x8's - 94 965 Niiice MONEY PIT! - 76 Datsun 280Z lowered, modified head, cam, headers, intake

I just did two of our cars last week. I use a clear aquarium hose that is a press fit over the top cooling line connection on the radiator. I run it into the pan I use for draining my oil. I usually run about two quarts out and then turn off the engine before adding two quarts and repeating the process. After the sixth quart has run out I reconnect the line and add what I need to bring it up below the full mark. I take it for a drive and once it is hot I top it off to the full mark on the hot side of the dipstick. I change mine out about every 20,000 miles so it doesn't really get dirty and I think six quarts is enough to "flush" it if you do it often enough. ATF is very inexpensive when compared to transmission work...

Randy

I just did this last weekend with nothing more than a piece of 1/2 inch ID rubber hose and a single hose clamp. Remove the top trans cooler line at the radiator, run the hose over to your dump bucket, run the car and feed it more fluid as it comes out. Top off when you've flushed enough. What's enough? I put 6 quarts through it- my fluid was pretty dirty. Your call.

Note: on my 240, there was a perfect spot to hold the 1-qt empty bottles of ATF, along the frame rail right next to the cooler lines and exhaust manifold. The bottles stood upright, and since they had the clear line up the side, I could see when they were full. It only took 15 seconds or so to remove 1 qt.
Then I poured in the new quart, and used that bottle for the waste. Worked great and in 1/2 hour or so I was all done and cleaned up.

Good luck!
--
Rob Bareiss, New London CT ::: "Roterande Fläkt Och Drivremmar!"

It's a great product. Yes, it is as easy as advertised. There are no cons, only pros: your tranny will be completely flushed at very low cost and will both perform better and last much longer. You will also prevent problems such as o/d solenoid clogging and valve ball wear.

This procedure should be MANDATORY for all Volvos on a regular, but infrequent basis. I did a complete flush on each car with Mobil 1 synthetic. I drain the pan at scheduled intervals. The fluid has remained clean and bright, with no evidence of dirt or wear particles. Consider springing the dough for the synthetic if you can (although that's a big commitment at $5 per quart for ten quarts).