Don't wanna see another 4L60 OR 4L80 tranny the rest of my life...I retired from that assembly plant...We had three to four lines running at 175 to 190 transmissions per hour, per line..!! But quality was outstanding...One failure per 6o thousand units built..JD Powers listed our plant as having an exceptional rating...618 parts per unit.!..Fully assembled they would pressurize them under water for any leaks with torque converters installed...Try working THAT job..Dropping 175/190 torque converters on the assembled trannies per hour..8 hours of that and I guarantee a good nights sleep.!!