Juddering Diff or Motor

[draperst]

Hello

Bought a used SSGT with a used Trackstar motor, any ideas what this juddering could be? http://youtu.be/QFWMdOqwr9M

I rebuilt the diff, running a 32T pinion and 70T Spur, all is nice an smooth once up to speed.

I have the trigger on the throttle low then progressively increase the speed.

Thanks
Stuart

[iank55]

First thing to check would be the sensor lead.

[draperst]

Just switched leads, same juddering. I have tried it under load (no weight on the rear vs on the ground) just the same. could it me the motor? The ESC is brand new.

[luniemiester]

Did you recalibrate the radio end points to the speed controller and try increasing your throttle dead band to the next level

[luniemiester]

Also have you wired the A B C wires to the correct terminals as I've seen that before where the sensor board is looking to fire the A phase but it is actually on the B phase etc

[draperst]

Originally Posted by luniemiester

Did you recalibrate the radio end points to the speed controller and try increasing your throttle dead band to the next level

that fixed it (recalibration), thanks.

[shinytopman]

Drape rat
Whenever you change receiver, esc, handset its normally best to recalibrate even if all seems to be fine.
It might look fine but if your not making full throttle it will hurt, especially down the straight.