If using a TransGo SK-700 or SK-700 jr, A Band shim is included. Install Servo & Shim without the Blue Cover O-ring.
If the Output turns both directions, Leave the Shim in. If the Output is locked, Take the Shim out.
The factory procedure is to use a Servo Pin Depth Gauge Tool, I don't use the tool, It's a PITA to set-up & I really do not trust it.
I do a Wiggle Test with a 90 degree Awl, I like around 1/8" total up & down movement. Install Servo & check before final assembly!! Use Apply Pin Length chart below for selection for a loose or Tight Band.
Sonnax has a extra long Apply Pin that be ground to a Custom length
http://www.sonnax.com/parts/2477