E4OD Governor Pressure Solenoid 1998, new and ready to install. Fits the E4OD. Ships fast from the USA.
A 1998 Ford truck or van with the E4OD that has started pulling away in second, refusing fourth, or banging into gear often gets searched as a governor pressure solenoid problem. There is no governor in this transmission, and there is no separate governor pressure solenoid to buy. The electrical part that controls shift timing and line pressure is the solenoid block bolted to the bottom of the valve body, and that is what this listing is: a new late-style E4OD solenoid block, pictured with its molded case connector, for the 1998 model year.
By 1998 the E4OD was on its last year under that name before the 4R100 took over, and it was running on Ford's OBD-II powertrain computer. The computer reads throttle angle, engine load, road speed, transmission fluid temperature and the selector range, then commands the block. Inside are two on/off shift solenoids whose combinations select the four forward gears, a coast clutch solenoid for engine braking, a converter clutch solenoid for lockup, and the electronic pressure control (EPC) solenoid. The EPC is the one doing the work a governor pressure solenoid does elsewhere: it varies line pressure from moment to moment so shifts stay firm under a load and smooth when empty. The solenoids share a single power feed and one connector, so the block is sold and replaced as one assembly.
Scan the truck with any OBD-II tool and write down every code, pending and stored. Then unplug the case connector and check the block with the key off. ATSG lists 20 to 30 ohms for the shift, coast clutch and on/off converter clutch solenoids, and 3.0 to 5.0 ohms for the EPC. A coil that reads open or shorted condemns the block. If the readings are good, inspect the connector itself, since Transmission Digest reports this transmission family has more case connector trouble than most, from corroded pins to broken lock tabs. The E4OD shift solenoid guide includes the gear-by-gear solenoid chart, and our E4OD common problems guide covers the valve body and pump faults that can imitate a bad block.
This block is listed for 1998 E4OD transmissions. Sonnax places 1998 inside its late E4OD group (1995-98), the same group as non-PWM 4R100 units built from 1998 on. Some 4R100 transmissions use pulse-width-modulated converter clutch control, which calls for a different block, and 1998 is the changeover year between the two transmission names. Check the tag on your transmission, compare the connector and part number on your old block to the photo, or send us your year and VIN and we will confirm it before shipping. A 1995 to 1997 truck uses the 1995-1997 E4OD solenoid block, and the rest of the parts for this transmission are on the E4OD/4R100 parts page.
You do not need to pull the valve body. Drain the fluid, remove the pan and filter, disconnect the internal connector and unbolt the block. Clean the case connector and replace a cracked lock before anything else goes back together. Coat the new O-rings with ATF, start every bolt by hand and torque them evenly to 80 to 100 inch-pounds so the block seals without distorting. Install a new filter and gasket, refill with MERCON V, and check the level hot in Park. Clear codes and drive the truck through every gear, including manual 2 and 1 to confirm the coast clutch, and a long highway stretch to confirm lockup. If shifts are still sloppy with a good block, the hydraulics need attention, and an E4OD shift kit or a fresh E4OD pump is the next step for a truck that tows.
| Fits | E4OD 1998 |
| Part type | Governor Pressure Solenoid |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The E4OD has no governor, so no part by that exact name exists for it. Line pressure is set by the EPC solenoid and shift timing by two shift solenoids, all inside this solenoid block.
Sonnax groups non-PWM 4R100 units with the late E4OD block. Units with PWM converter clutch control need a different block, so check your transmission tag and send us your VIN if you are unsure.
P0750 and P0755 for the shift solenoid circuits, and P1744 for converter clutch problems, are common. Ohm-test the block and check the case connector before deciding.
Key off: 20 to 30 ohms for each shift, coast clutch and on/off converter solenoid, and 3.0 to 5.0 ohms for the EPC solenoid.
MERCON V automatic transmission fluid. Check the level hot in Park after a road test.
