4L30E Pressure Control Solenoid 1993-2003, new and ready to install. Fits the 4L30E. Ships fast from the USA.
This page is for owners of a 1993-2003 vehicle with the GM 4L30E four-speed automatic, most often an Isuzu Rodeo or Trooper, a Honda Passport, an Acura SLX, a Cadillac Catera, or a six-cylinder BMW automatic, whose transmission now thumps hard into Drive, slurs its shifts once warm, or has fallen back to a fixed backup gear. It is a new GM-branded pressure control solenoid, the round black force motor with an aluminum spool nose and two flat terminals at the base, exactly as the photo shows. The listing references GM/ACDelco number 24220158. Compare the old part with the photo before ordering, because the 4L30E did not use one pressure solenoid design for its whole life.
The 4L30E has no throttle valve cable. Line pressure is set entirely by the transmission controller through this force motor. The controller sends it a varying current; the coil moves a small spool in the nose, and the spool meters a signal oil that pushes on the pressure regulator. Low current gives high line pressure, and the controller raises current as it wants softer applies. Because every clutch and band in the 4L30E is applied with that line pressure, the force motor decides how firm each shift feels, while the separate on/off shift solenoids decide when a shift happens. A force motor with a weak coil, a worn spool, or debris packed around its nose screens no longer gives the pressure the controller asked for, and the unit either slips or bangs.
Not every 4L30E complaint is a pressure problem. A transmission that will not back up, or goes to neutral in Reverse, is more often a reverse clutch or center support fault, which a new solenoid will not cure.
Check the fluid first. Burnt, dark fluid with friction material in the pan means internal clutch wear, and a new force motor will only make that more obvious. Next, read the codes, then measure the force motor circuit at the transmission connector for resistance and shorts using our multimeter solenoid test guide. On the earlier Isuzu and Honda vehicles without a full OBD-II scan path, our guide to solenoid testing without a factory scan tool fills the gap. The final check is a gauge on the line pressure tap; if pressure does not move as throttle increases, the force motor or its circuit is the cause. Our flare versus slip guide helps separate a pressure problem from worn clutches.
This listing is for the 4L30E from 1993 through 2003. That span covers the Isuzu Rodeo, Trooper and Amigo, the Honda Passport and Acura SLX, the Cadillac Catera, and the BMW 3 Series, 5 Series and Z3 automatics that used the 4L30E. The important caution is the late years. Parts catalogs show that 2000-and-later 4L30E applications can use a different electronic pressure control solenoid, so a 2000-2003 vehicle may need our 2000 4L30E pressure control solenoid instead of this force motor. The surest check is the old part itself: match the round body, the two flat terminals and the spool nose to the photo, or send us the year and VIN and we will confirm before it ships.
| Fits | 4L30E 1993-2003 |
| Part type | Pressure Control Solenoid |
| Condition | New |
| Brand | GM |
| Reference | 24220158 |
| Ships | From the USA |
| Warranty | 1-year |
Maybe. Parts catalogs show 2000-and-later 4L30E applications can use a different pressure control solenoid. Compare your old part to the photo, which shows the round GM force motor with two flat terminals, or send us your year and VIN and we will confirm before shipping.
The listing references GM/ACDelco 24220158. Check the number or the shape of your original part to be sure it matches.
Usually a hard bang into Drive or Reverse and firm shifts when line pressure runs high, or soft, flared shifts when it runs low. Shift quality that changes with temperature is a common sign of a sticking spool.
Yes. Measure the force motor resistance at the transmission connector, check for a short to ground, then confirm with a line pressure gauge. Correct resistance alone does not rule out a stuck spool.
Always replace the filter and pan gasket and refill with the correct fluid. On a high-mileage unit, the converter clutch and shift solenoids on the same valve body are worth doing while the pan is off.
