Powertrain, generic (extended)

P2877 Clutch B Disengagement Time Performance/Too Slow

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2877 means clutch B releases too slowly after the command to open. While it lingers, the outgoing clutch fights the incoming one, so shifts out of even gears and reverse feel heavy, the car may shudder or the engine can be pulled down at a stop. Ford includes P2877 as an MIL code in its 2014 diagnostic code list. In Ford's PowerShift (DPS6) design clutch B serves reverse and the even gears, and each dry clutch is returned to the open position by a spring once its electric actuator motor is switched off, so a slow release points to that mechanism or to clutch wear. Beyond that no manufacturer publishes detection criteria, and CARB 13 CCR 1968.2 provides the legal basis. On wet systems check the vent path of the clutch valve.

Likely causes

Clutch B actuator or return spring not opening the clutch quickly
Clutch B wear or glazing changing the release behaviour
Restricted vent path on wet-clutch systems

Symptoms

  • Heavy or shuddering shifts out of even gears and reverse
  • Engine pulled down or stalling at a stop
  • MIL on

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–3,500
Time0.5–8 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

clutch bclutch actuator btransmission fluid

Related codes

P286FP2878P2875P285AP07A5

References: performanceparts.ford.com, newtonnet.co.uk, law.cornell.edu.