Dropped the pan and changed the fluid. I took the pressure solenoid out to check the o-rings and make sure it is not restricted. I also adjusted the rear band. When I went to adjust the front band I noticed the spring on the lever to the throttle was broken. I adjusted the band and replaced the spring. Took it for a test drive and the transmission shifts good but I still have no overdrive. I checked the codes and there is no code for the transmission. If the solenoid is bad won't it throw a code? Is there any symptom of a worn overdrive clutch? Still trying to figure this out.