GM 4L30E 4-Valve Pump Assembly
The GM 4L30E 4-valve pump assembly, often identified as the PWM-style pump (typically 2000-up, but with 4-valve construction), primarily fits various BMW, Isuzu, Cadillac, and Honda applications from approximately 1990–2004. It is characterized by its use in longitudinal, rear-wheel drive, or 4×4 vehicles with two fluid pans.
Key 4-Valve Pump Fitment (Approx. 2000–2004 Focus)
While many 4L30E components are interchangeable from 1990–2004, the 4-valve pump configuration is often specifically cited for later models:
While many 4L30E components are interchangeable from 1990–2004, the 4-valve pump configuration is often specifically cited for later models:
- Isuzu Axiom: 2002–2004
- Isuzu Rodeo/Rodeo Sport: 2000–2003 (specifically later models)
- Isuzu Trooper: 2000–2002 (2000+ uses this design)
- Isuzu VehiCROSS: 1999–2001
- Cadillac Catera: 1997–2001
- BMW Z3: 1996–2000
- BMW 528i: 1997–2000
- Honda Passport: 1994–2002
Common 4L30E 4-Valve Pump Vehicle Applications (1990–2004)
The 4L30E transmission, in general, uses a 4-valve type pump assembly across these vehicles, particularly in those requiring a PWM (Pulse Width Modulated) torque converter clutch setup:
- Acura: SLX (1996–1999)
- BMW: 318i/is (1991–1998), 323i/is (1998–1999), 325i/is (1991–1995), 328i/is (1996–1999), 525i (1991–1995), 528i (1997–2000), Z3 (1996–2000)
- Cadillac: Catera (1997–2001)
- Honda: Passport (1994–2002)
- Isuzu: Amigo (1998–2000), Axiom (2002–2004), Rodeo (1991–2003), Trooper (1990–2002), VehiCROSS (1999–2001), Pickup (1992–1994)
Important Technical Notes for Fitment
- PWM vs. Non-PWM: The 4-valve pump is generally used in PWM (Pulse Width Modulated) applications (approx. 2000-up). Some rebuilders offer kits to interchange PWM and Non-PWM pumps.
- Pump Stator Identification: These pumps often fit units with a 0.595″ outer diameter pressure regulator valve.
- Connector Configuration: 4L30E transmissions from this era (specifically Isuzu/Honda) switched from round to square connectors, but the 4-valve pump is often used to replace the older, 2-valve, or 3-valve setups, provided the solenoid matches.
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