So I have a suncoast full billet trans. Yesterday it wouldn't shift out of 2nd. I checked fluid and it was 2 qt low. I added the fluid and it now wont engage any reverse or drive. I found out if I start the truck and switch immediately to either reverse or drive it will go into gear. It seems it's starting in 2nd and wont switch to 3rd. I have the gm solenoid so I dont know if I should replace that and the transducer or if maybe something else is wrong.