2010 endeavor shudder
 

Glad to join, have recently bought a 2010 se with 137000. These have good reviews so $4000 seemed like a good deal. had the tube seal leaks and output shaft seal I had to do. Got it running good but developed a shudder a couple days after we got it home when taking off slow only. I changed out the fluid and have put 200 miles on it, Still there. Can't change the filters on these of course and only codes it throws is p1770 ( Inhibitor switch open ) and three others that say no data for coolant, na abs and na ac.? Hoping it just goes away like I've heard but I feel like the lockup solenoid has a short. Idk I have no book of course. I'll have to get one but does anyone know where I can start to test finding a short?