End plug kit 4R44E, 5R55E

End plug kit 4R44E, 5R55E Small End Plugs (2) Large End Plug Small O-Rings (5) Large O-Rings (3) Checkballs (4) L Retaining Pins (4) Symptoms: Erratic shifts Gear ratio & solenoid codes No 3rd when hot No 4th when hot Shift timing change with temperature Cause: Wear of bore end plugs allowing solenoid feed oil to exhaust. Correction: The Sonnax kit contains O-ringed end plugs to positively seal the bores.