The remanufactured 4L30E 4-valve pump assembly generally fits 1991-2004 GM-built 4L30E automatic transmissions used in Isuzu, BMW, Cadillac, and Honda vehicles. This 4-valve (PWM-type) pump is commonly used to replace or upgrade older 2-valve units to address TCC burn-up, 2-3 cutloose, and low band failures.
Key Vehicle Applications (1991–2004):
- Isuzu: Trooper (1990-2002), Rodeo (1991-2003), Axiom (2002-2003), VehiCROSS (1999-2001)
- BMW: 3 Series (318i/is/ti 1994-1999), 5 Series (525iT 1993, 528i 1997-2000), Z3 (1996-2000)
- Cadillac: Catera (1997-2001)
- Honda: Passport (1996-2002)
Commonly Associated Issues Addressed:
- Chronic low band failure
- Repeated TCC (Torque Converter Clutch) burn-up
- Slipping 1st and 2nd gear
- 2-3 cutloose
The pump assembly often includes alignment tools or special 3rd drum support bushings to facilitate installation
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