Powertrain, generic (extended)

P2705 Transmission Friction Element F Apply Time Range/Performance

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

P2705 covers the sixth friction element, F, so only transmissions with at least six shift elements use it, such as Ford's ten-speed and eight-speed families. The controller has found that F applies outside the time it has learned. Ford's SSM 50617 for Edge ST and Nautilus models from 2020 to 2022 with the 8F57 built up to 18 March 2022 reports cars returning to Park when drive or reverse is selected; the main code is P2707, and P2705 may accompany it. The cause is the F clutch piston, which serves second and eighth gear and whose rubber sealing surface can be damaged. On the 10R140, TSB 20-2375 includes P2705 among the codes from sticking main control valves and lets all six clutches be cycled. Roush's propane Ford chassis store P2705 without MIL.

Likely causes

Damaged F clutch piston seal (Ford 8F57)

Sticking valves in the main control valve body

Shift solenoid F not controlling pressure correctly

Low or degraded transmission fluid

Symptoms

Harsh or slipping shifts in the gears using clutch F
Vehicle may fall back into Park when drive or reverse is selected (Ford 8F57)
Warning light on

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€150–3,500

Time1–12 h

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

Parts involved

friction element fhydraulic control unitpressure control solenoid

References: static.nhtsa.gov, static.nhtsa.gov, roushcleantech.com.