Just like somebody is pressing the button that disengages the trans ( off on off on off on ) it happens in all gears and forward and reverse, does'nt always do it. I'm guessing wiring but not sure how the system works, will check it out tomorrow. Appreciate any insight, is there a solonoid that disengages the trans?
It was a loose relay for the shuttle timing in the fuse block ( the big one) put a new relay and zip tied it, all is well. Dealer was very helpfull to pin point the problem by phone.