1: Different size friction plate to adjust the lock effect (6 types of diffferent size and materials)
2: Different position for for the center shaft for the time for the diff to start locking (3 position)
3: Different preload for the intial lock effect adjustment (unlimited step as it is an adjustment screw)
4: Different amount of oil use to fine tune the lock effect. (can use from 7mL to max 20mL) according to manual. Only try 10 and 17mL for now.
Will try to use larger glassfiber friction plate tonight if it stop raining............