Complete CD4E (LA4A-EL) valve body with the shift solenoid block and harness attached, for Ford and Mazda four-speed units 1998 and up.
If your Escape, Tribute, Mariner or Mazda 626 with the CD4E four-speed is flaring on the 2-3 shift, banging into gear, engaging late in the morning or setting converter clutch codes that keep returning after the solenoids test good, the casting itself is usually the problem. This is a complete CD4E (Ford LA4A-EL) valve body for 1998 and later units, delivered with the shift solenoid block, internal harness and case connector already mounted so it goes in as one piece.
The CD4E is the transverse four-speed Ford and Mazda introduced in 1994 in the Probe and 626, carried into the Contour and Mystique, and later used in the Escape and its Mazda and Mercury twins. Its valve body holds the pressure regulator valve that sets line pressure, the shift valves that route oil to the clutches and band, and the bypass clutch control valve that applies and releases the converter clutch. The solenoid block on top of it lets the computer command each gear and modulate pressure through the EPC solenoid. When those aluminum bores wear, oil leaks past the valves, pressure stops tracking engine load, and the computer is left trying to time shifts with a hydraulic system it can no longer control. Industry writers have long called valve body wear the most damaging weakness of this transmission, because the pressure problems it creates go on to burn clutches and the band.
Scan first, then put a gauge on the line pressure port before you pull anything. A CD4E with good hydraulics shows line pressure rising as you add throttle. If pressure stays flat with load, the pressure regulator valve or its bore is suspect. High pressure with harsh shifts points to a worn regulator bore or the EPC circuit running in failsafe, while low pressure at idle with delayed engagement leans toward the pump or filter instead. Our line pressure testing guide covers hooking up the gauge and reading the numbers. Converter clutch codes on this unit commonly trace to a worn bypass clutch control valve, which is in the valve body, so a new assembly addresses that too.
This assembly is listed for CD4E and LA4A-EL transaxles built in 1998 and later, which covers the Mazda 626, MX-6 and Tribute, the Mercury Mariner and Ford applications of the same transaxle. Ford and Mazda made several running changes to the solenoid block and internal parts during the 1990s, so lay your old valve body next to the new one and match the casting, bolt pattern and case connector before you install. If you are not sure which version you have, send us your year and VIN and we will check it. You can browse our other transmission model pages from the shop by transmission section.
Drain the fluid, remove the valve body side cover, unplug the case connector and remove the bolts, keeping track of their lengths because they are not all the same. Clean the case mating surface thoroughly, fit new gaskets and a new filter, and torque the bolts in sequence to the factory value so the casting does not warp. Refill with Mercon V, such as our Motorcraft Mercon V case, and check the level hot with the engine running. Clear codes and reset adaptive learning afterward; our relearn guide explains why the first drives can feel different. If the fluid was dark and full of friction material, the clutches and band have probably already taken damage, and pairing the valve body with a CD4E master rebuild kit with pistons is the job that lasts.
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This assembly is listed for 1998 and later CD4E units. Earlier units went through solenoid block and internal changes, so compare the casting and connector to your original, or send us the year and VIN before ordering.
No. The shift solenoid block, internal harness and case connector come already mounted on the valve body, so it installs as one assembly.
Mercon V automatic transmission fluid. Check the level hot with the engine running after the install and top up as needed.
If line pressure fails to rise with throttle, the pressure regulator valve and its bore are the likely cause and a complete valve body corrects that. If the band or clutches are already burned, the flare will remain until those are rebuilt.
Clear the codes and reset the transmission adaptive values, then drive through every gear under varied throttle so the computer can relearn shift timing on the new hydraulics.
