I just got a check engine light after not seeing it for a while. 2 codes come up. The first is P0700 the second was P0740. I found that P0740 is referencing engine speed too high and also mentions possible torque converter lock up clutch bad. Is there a way to test this? I recently replaced all of the shift solenoids with new ones.

Thanks again for all the help and advice.

 

anyone have any ideas with this? I drove it around and it is shifting fine. The RPM's were at 2K at 60mph and about 18-19K at 50mph. It seemed like the torque converter was locking up fine at about 43mph with easy pedal as it normally does.

Any help and/or advice please, would be GREATLY Appreciated.