Ford 6F35 harsh forward re-engagement after stop/start - Transmission Digest

Ford 6F35 harsh forward re-engagement after stop/start

The complaint

A 2014 to 2016 Ford Escape equipped with the 6F35 transmission built on or before Feb. 26, 2016, may have a complaint of a harsh forward or reverse engagement after an active stop/start event. The Malfunction Indicator Lamp may be illuminated and diagnostic trouble code P0C27 “Auxiliary Transmission Fluid Pump Motor Current Low” may be set.

The cause

The above-mentioned complaint can be caused by air entering the auxiliary pump suction pipe due to the suction pipe not having a check ball in it which would prevent air from entering the tube—refer to figures 1 (above) and 2 (below). This also caused the false code P0C27 to be set, which would have led the technician to the possible replacement of the auxiliary pump or its control system components.

Figure 2.

The correction

Replace the original suction pipe with the next design level suction pipe that has a check ball capsule in it using the part number seen in figure 11 and listed under “Service Information.” Torque auxiliary pump bolts to 115 lb./in. (13 N~m). Clear all trouble codes and check the fluid level.

Tech-Talk-May-Figure-11
Figure 3.

Service information

  • Suction Pipe with Check Ball Capsule: DG9Z-7890-G
  • Auxiliary Pump Gasket: DG9Z-7A136-B
  • Auxiliary Pump Bolts (3 Required): W715931-S437

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