Arrma big rock 3s and Kraton 6s

[Turbolsx03]

I have a few arrma trucks got to kraton 6s a big rock 3s and granite 3s now my big rock and one of the kratons having steering issues will steer left and trying to calibrate the end points the left will respond to the a and b button but the right will not turn out only the b button turn it in just a hair than stops need some help thanks

 

[RC Steve]

With the truck turned on and the steering wheel at neutral do the front wheels point forward? If the answer is no then it's a stripped servo horn.

 

[Turbolsx03]

I have taken the servo apart it’s legit just a bare servo just to see if it would do it with nothing on it and it still doesn’t and I have also tried two other one that I know are good still the same