Kubota l3830

I am getting a error 60 , Gst light flashing , tractor pulls and shifts , i can shut it off put when i put it into gear it comes back on .

I have a Kubota l3830 with GST transmission. I am getting an error message 60 GST light blinking. Tractor will pull and change gears... The message has been cleared off but returns when gear shift is moved.. Idea of what is going on? Thanks

Thanks for the info , this tractor had the wiring harness cut in a wreck , i put all back together , but i noticed some was the same color , what gets me the tractor shifts and works normal , i got a wsm workshop manual but haven't been able to find the trouble , i can unhook the wire from the value tractor want move