722.6 Trans. ALL TAKE SYNTHETIC FLUILD. Low fluid level could be a problem. I have replace a lot of soleniod plates in the 722.6 Trans. It is the board that all of the shift soleniod connect to on top of the valve body. It also is where the input and output shaft speed sensors are located. If the board is losing contact with a speed sensor it will shift out of gear or go into what we call "limp home mode" second gear and will not shift up. If this is the case a code will be store in the ETC, the trans. control module.

It's only about $40 at the dealer then you'll know if the level is the problem. I'm sure if you paid the dealer to check it they would charge you $40 so you might as well buy the tool...don't forget to buy the locking pin for the cap too! Those are only a buck or so.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

How do you then determine the exact temperature to read the stick?

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

I have taped a wire thermocouple to the dip stick plastic part and when I insert it it reads the temperature and then I pull it and read the correct level based on the temperature of the fluid. But usually you do not need the teperature if you are checking it in the morning before driving then it is cold and when you have been driving for a while then check the level it it will be hot.

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2010 ML350 Bluetec
2012 Mustang Convertible