JD 6220 Transmission issue

[BBOB57]

Greetings,

I have a low hour 6220 with a left had reverser. The last time I used it, it would jump to neutral on the reverser and the tach would quit. Also, I got three flashing warning light on the dash. This happened after about 1 hour of use. I can shut the tractor off for 5 -15 min. and it will work for a while. I looked at the solenoids on the transmission, and the one on the opposite side from the FNR solenoids (#27 on the diagrams I have seen on this forum) appears to have hydraulic fluid in the connector. Can anyone tell me what this solenoid does and can it cause this problem?

Thanks,

 

[Eagleview]

If oil gets into these switches , it can upset the signal . Oil in your plug is a tell tail the switch is faulty . They have a seal on the detent shaft that is supposed to keep the oil out of the switch but they fail .
The top switch on my New Holland is faulty , if I go on a steep angle to the left , the oil gets into the switch and the shift is erratic for a few hours . I haven't had time to pull it out and order a new one .