I'm not sure the trans is bad, the other day I was going down the interstate and went to slow down and the car completely locked up, had it towed home and when he was unloading it and what ever had locked up unlocked. I talked to a couple people and the said it was prolly the brake caliper so I rebuilt them and when u drove it it ran fine and changed gears but when I let off the gas there is this grinding/ whining sound. I could use some help cause I'm not sure what could be wrong. I had also drained all the trans fluid and it was free of all metal or anything... Thanks