Fault Phenomenon: SANY SKT105 wide body mining truck transmission locked in one gear, unable to shift.

Troubleshooting Process:
– Checked feedback rod: feedback rod connecting to shift valve broken or detached.
– Checked pivot point: ball joint worn and detached.
– Checked regulator: internal regulator stuck.
– Checked spring: spring broken.

Root Cause: The mechanical feedback rod of the transmission variable mechanism broke, preventing the spool from returning or moving.

Required Parts: Replace feedback rod and ball joint.