Separate countershaft 1st gear (A) from the park gear (B) by turning the park gear in the direction shown. Pry the one-way clutch (A) up with tip of a screwdriver (B) and remove the one-way clutch from the countershaft 1st gear (C).

Inspect the park gear (A) and 1st gear (B) for wear and scoring. Inspect the one-way clutch (C) for damage and faulty movement. Assemble the 1st gear, one-way clutch and park gear. Hold the 1st gear (A) and turn the park gear (B) in the direction shown to be sure it turns freely. Also make sure the park gear does not turn in the opposite direction.