Whunter - I found the exact answer in one of the lines in your reply:

I have never used a torque wrench with an adapter. I have a 1/2" drive wrench and 3/8" drive sockets and an adapter. Do I have to convert the amount of torque applied in this situation?


DRW1000Re: Torque conversion 1/2" drive to 3/8" socket
No. Just like you do not need to worry about what socket size you use either. The force only "enters" the wrench at the 1/2" drive point. It also does not matter where you grip the wrench along the shaft It may make it harder for your arm but the reading or click will be accurate.