P284A

Shift Fork B Stuck

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–222 (est.)

Symptoms

Gear shifting problems
Switching delays
Transmissions are not included
Jerks when switching
Check Engine Light Is On

Causes

Mechanical wear of the shift fork
Contamination or lack of lubrication in the gearbox
Shift solenoids malfunction
Problems with the hydraulic system
Transmission control module (TCM) malfunction

How to Fix

Check the level and condition of the oil in the gearbox
Diagnose the operation of switching solenoids
Check the hydraulic system for leaks
Disassemble the gearbox to inspect the shift fork
Replace damaged or worn parts

Related codes

P284B P284C P284D