I have a 2006 LS that out of the blue lost 3rd gear. In D5 and D4 it will shift fine from 1rst to 2nd then when shifting into 3rd its a hard shift and once in I lose all power. If I give it gas in 3rd it will just rev high and not give any power. I can use the sport shift and skip 3rd all together and in 4rth it seems okay but not 100% as its pretty bogged down by the time I can get it in. Could this be a symptom of a failed solenoid? Ive had random hard shifts going from 2nd to 3rd for awhile. I haven't opened it up yet to see the fluid, but I will provide updates as I get farther into it. Just thought I would get the conversation going. 122k miles no fluid leaks or check lights.