What causes a shift solenoid to fail "Always On"?

According to the document, failure ON is due to powertrain control module and/or vehicle wiring concerns, or the shift solenoid (7G484) being electrically or hydraulically stuck ON.

What gears do you get if SS-1 is always on in Drive (D)?

With SS-1 always on in (D): PCM commanded 1st gives 1st, commanded 2nd gives 1st, commanded 3rd gives 4th, and commanded 4th gives 4th.

What happens if SS-2 is always on in Drive (D)?

With SS-2 always on in (D): commanded 1st yields 4th gear, commanded 2nd yields 3rd, commanded 3rd yields 3rd, and commanded 4th yields 4th.

What does the (a) footnote in the tables mean?

The (a) footnote indicates "No Engine Braking" for that gear condition.

What gear results in ranges 2 and 1 when SS-2 is stuck on?

In selector positions 2 and 1 with SS-2 always on, all PCM commanded gears (1–4) result in 2nd gear with no engine braking.

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Shift Solenoid Failure Always On - SS-1 & SS-2 Stuck ON Gear Chart (7G484)

Ford shift solenoid SS-1/SS-2 Always On failure gear chart vs range selector position (P/N 7G484)

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Ford automatic transmission diagnostic table: gear obtained per PCM-commanded gear when SS-1 or SS-2 shift solenoid (7G484) is stuck Always On, by D/2/1 range position.

AI caption April 2008 · Photo 18 of 86

This service reference document describes automatic transmission shift solenoid failure in the "Always On" condition, caused by powertrain control module (PCM) and/or vehicle wiring concerns, or by shift solenoid (part reference 7G484) being electrically or hydraulically stuck ON. Two diagnostic tables are provided. The first table covers Shift Solenoid 1 (SS-1) always on: it compares the PCM commanded gear (1 through 4) against the actual gear obtained in each transmission range selector lever position — (D), 2, and 1. For example, with SS-1 stuck on, commanding 1st or 2nd gear yields 1st gear in all ranges, while commanding 3rd or 4th yields 4th in (D) and 2nd (with no engine braking) in ranges 2 and 1. The second table covers Shift Solenoid 2 (SS-2) always on: in (D), commanded gears 1–4 yield actual gears 4, 3, 3, and 4 respectively, while in ranges 2 and 1 all commanded gears result in 2nd gear with no engine braking. Footnote (a) in both tables denotes conditions with no engine braking. A technician can use these tables to identify which solenoid is stuck ON based on observed gear behavior.

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Frequently asked questions

What causes a shift solenoid to fail "Always On"?: According to the document, failure ON is due to powertrain control module and/or vehicle wiring concerns, or the shift solenoid (7G484) being electrically or hydraulically stuck ON.
What gears do you get if SS-1 is always on in Drive (D)?: With SS-1 always on in (D): PCM commanded 1st gives 1st, commanded 2nd gives 1st, commanded 3rd gives 4th, and commanded 4th gives 4th.
What happens if SS-2 is always on in Drive (D)?: With SS-2 always on in (D): commanded 1st yields 4th gear, commanded 2nd yields 3rd, commanded 3rd yields 3rd, and commanded 4th yields 4th.
What does the (a) footnote in the tables mean?: The (a) footnote indicates "No Engine Braking" for that gear condition.
What gear results in ranges 2 and 1 when SS-2 is stuck on?: In selector positions 2 and 1 with SS-2 always on, all PCM commanded gears (1–4) result in 2nd gear with no engine braking.