Shift Fork B Unrequested Movement

Check these first

• A shift fork B that moves without a command
• A leaking shift fork B actuator seal
• A failed shift fork B position sensor
• Debris holding the shift fork B valve open

What to do next

1. Read shift fork B position on a scan tool at rest
2. Watch for shift fork B movement with no shift commanded
3. Command shifts and confirm the shift fork B moves only on command
4. Test the shift fork B actuator for a leaking seal
5. Replace the shift fork B actuator if it moves uncommanded
6. Clear the code and retest

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