HOW I ADJUST BACKLASH
I use this tool to adjust the backlash in the crown wheel and pinion, This was on the back axle for the Lincolnshire Group’s trial car. The tip of the tool should only indicate 1/16th of an inch movement. This equates to 0.004 inch. It is easy to do on the car through the greasing hatch behind the front seats.
If re-building an axle then the meshing needs to be checked with engineers marker. It involves fore and aft movement of the torque tube with shims and side to side with the rotary adjusters.