From the description it sounds as if you knocked the hose off the modulator valve. Make sure it is getting engine vacuum.

Also, you will be doing a MUCH better job of transmission service if you will drain the torque converter as well as the pan. It only takes just a little longer to do this.

Hope this helps.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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