4th Gear
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Clutch Application Chart
| Gear | Forward (1, 2, 3, 4) | Direct (3, 5, R) | Intermediate (2, 6) | Low / Reverse (1, R) | Overdrive (4, 5, 6) | Low-OWC |
|---|---|---|---|---|---|---|
| 4th Gear D | D | D | ||||
| Planetary Components | Front planetary carrier-to-No. 3 sun gear | Front carrier-to-No. 2 sun gear | No. 2 sun gear | Rear planetary carrier | Input shaft-to-rear planetary carrier | Rear planetary carrier |
D = Driving
Solenoid Operation Chart
| Selector Lever Position | Commanded Gear | SSA NL (1, 2, 3, 4) | SSB NH (3, 5, R) | SSC NL (2, 6) | SSD NL (1, R) | SSE NH (4, 5, 6) | TCC NL | ||
|---|---|---|---|---|---|---|---|---|---|
| D | 4 | On | On | Off | Off | Off | On/Off (1) | ||
|
|||||||||
NH = Normally High
NL = Normally Low
Powerflow
In 4th gear, SSA is commanded ON by the PCM/ TCM to apply the forward (1, 2, 3, 4) clutch. SSE is commanded OFF by the PCM/ TCM to apply the overdrive (4, 5, 6) clutch. The forward (1, 2, 3, 4) clutch connects the front carrier to the No. 3 sun gear and the overdrive (4, 5, 6) clutch is applied to transfer power from the input shaft to the rear planetary carrier, providing a 1.149 to 1 gear ratio.