Have a turbo 350 transmission with a B &M Quicksilver shifter. Originally transmission was stuck in reverse. Verified both from shifter point of view in cab and under vehicle that shifter appeared to be shifting through all gears. Disconnected shifter rod from side of transmission to attempt to manually shift transmission into park. At first shift bracket turned feeling mushy then after about quarter turn it clicked into park. Can anyone tell me if something has come loose inside the transmission to cause this?