Do as post #4, but do not use the factory fluid it just accelerates the wear on the 722.6, and do not use the stuff you used. Use Shell 134 it is the best for the 722.6 and cheap.. If you are in the USA, here is how you get it.

Distributor Locator - United States.

I would also do a fluid exchange. This is how you do it..

Here is how I do a transmission fluid exchange it:

1) drain the transmission oil, replace the filter, and fill the pan to the correct level(about four quarts, and use the shell 134 oil)-No need to do this..

2) get a five feet of 3/8" ID clear tubing and a clear(or) graduated 1 gallon painters pail. Mark the pail inside and outside at the two quart level with masking tape.

3) disconnect the top transmission cooler line from the top of the radiator, and slip on the 3/8" clear tubing on the cooler line. Clip the other end to the inside of the pail.

4) Start the car( its about 30 to 60 seconds!!) only enough to get the four quarts in the pail FIRST!

5) Add four quarts to the pan

6)Start the car to get two quarts. I would do this for about ten to twelve quarts.

This technique is a will exchange all the fluid in the transmission, cooler lines, and torque converter. If you want to get anal, get a helper to watch the fluid in the paint pail, and shift the car into each gear through each oil cycle to exchange the fluid through the valve body.

You have fresh fluid on every crevice of your transmission. Others will call this a flush technique, but you are officially exchanging old fluid for new fluid.


What you probably have is oil incursion in the transmission computer, or one of the speed sensors went caput... Your ML is in LIMP MODE

Here is great thread...

http://www.peachparts.com/shopforum/tech-help/325722-722-6-transmission-refresh-diy-questions.html

Best of luck,

Martin