Nope, i have a spring on the linkage.

I actually did take the linkages completely off the servo, and the same thing occured....at times ZERO movement when I engaged the brakes. The wierdest part is that when I'd reverse the servo and hit the throttle trigger, the brakes WOULD work.

I've spent countless hours thinking about this logically, and it makes zero sense. I've started to contact Hitec to see if I can get a replacement servo, but this same issue seemed to happen with the futaba I had previously. I honestly don't think it's the servo. I'm wondering if it's in my spektrum RX/TX and maybe by the time I plugged it into my old Analog system it was already semi-broke. I have a few old servos I'm going to test with before I do anything.

Very very frustrating. That's for sure