Flysky GT3B won't reverse?

[Stan3535]

Hi there,
I just put a new speed control in a car and it works fine forward but it won't reverse with my hacked FlySky TX. I then tried it with another receiver and transmitter and reverse works fine. I have 14 cars on my FlYsky and I have had this problem one other time with a Castle ESC. Any tips? re-calibrating did nothing and resetting parameters via castle link did nothing.
Thanks a bunch!
Chris

 

[meatmonkey]

I've had issues with flysky radios not always precisely returning to neutral, especially ones with lots of hours of use. Typically I can use castle link to set the esc's neutral deadband to "large" and it works since it makes the esc less picky about the neutral position.