I completed the change a couple days ago. Vehicle starts, runs fine. After
15-20 minutes on the road the speedometer becomes erratic, fluctuating rapidly up and down, eventually after about a minute, settles to zero, where it remains until the vehicle is stopped and allowed to sit for a while. The auto shifting becomes irregular after the speedometer with higher than normal revs being required when it does finally change. A 30 minute cooldown period allows the vehicle to perform correctly for about another 15-20 minutes at which time the erratic behavior happens again. I have seen posts indicating the eeprom might need a reflash. Does anyone have any ideas about this problem? TIA CenturyTek