I repair lots of tranny problems by just cleaning the electrical connections.... sometimes just unplugging then plugging them back in will do the trick. Have you check the codes for the ABS?? It might help to narrow down the problems, you might just have no speed signal. I wouldn't rush into replace the solenoid as it could very well be just a poor connection. A very similar transmission is used in VW and Audis which I've worked on for several years.... if a solenoid is suspect, we just trade places in the valve body with another solenoid to see if the problem follows that solenoid. Check your ABS codes and let us know what you find.
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