Originally Posted by trilerian

It isn't to do with the timing per se. It happens, at least this is my best guess at why it happens, because the Tunalyzer runs in both directions and when it switches from reverse to forward that last time it can create a load higher than what the Tunalyzer can drive and the motor acts a lot like it is cogging. In my testing I only saw this on 13.5s and lower turn high torque motors, but HW says the amount of load the Tunalyzer can drive varies a between units. Now that is said, there are a few things you can do. 1, just do the manual test instead of the auto test. 2, be ready for the motor to stall and spin the adapter when it does, and it will continue the test (I have seen no difference in numbers doing this). 3, try a lower turn (ie, go to a 13.5 or 10.5 instead of the 17.5) slave motor, lower turn slave motors put less load on the motor under test. 4, I do have resistor banks with different values that put less load on the motor, I just don't have them listed on my site. If none of the above options work or are not practical for you, send me a pm.