Some 2016-2017 Fiesta ST vehicles may exhibit a clunk noise while shifting from 1st to 2nd gear. To correct this condition replace the front left C1BZ-3B437-A and right C1BZ-3B436-A half shafts. Refer to Workshop Manual (WSM), Section 205-04. Use causal part 3B436 and applicable labor operations in section 4 of the Service Labor Time Standards (SLTS) manual.
