i have a 94 4l60e trans in my s10 blazer, it wont downshift into 1st gear. i put a snapon 2500 computer on it and its showing a code 66 which is 3-2 downshift quad driver 2 solenoid. i did replace the 3-2 downshift solenoid. the trans makes like a whinning niose and when i clear the 66 code the noise stops and after about 15 -20 seconds the code comes back and so does the whinning noise. im not sure what else to do with the trans. if you could help me that would be great.