4L30E Pump, remanufactured and ready to install. Fits the 4L30E. Ships fast from the USA.
If your BMW 3 or 5 Series, Isuzu Rodeo, Trooper or Amigo, Honda Passport, Acura SLX or Cadillac Catera with the GM 4L30-E automatic is slow to pull into gear, slips everywhere when hot, or whines with engine speed, the front pump is one of the first parts to suspect. This is a remanufactured 4L30E pump assembly, ready to bolt in during an overhaul or a pump-only repair, so you are not left rebuilding a worn rotor set and bushing by hand.
The 4L30-E is a four-speed, longitudinal GM transmission built in Strasbourg, France, from 1991 to 2004. In GM's own cutaway the oil pump assembly sits directly behind the converter housing and ahead of the adapter case, driven by the torque converter hub. Everything downstream depends on it: the two shift solenoids, the force-motor pressure control, the TCC solenoid, the band servo and five clutch packs (overrun, reverse, 2nd, 3rd and 4th) all run on the oil this pump moves. GM rated the unit for 350 Nm (258 lb-ft) of engine torque, which is not much margin in a loaded Trooper or a towing Rodeo, so a pump that can no longer hold pressure turns into burned clutches quickly.
Be careful with reverse-only complaints. The 4L30-E is known for no-reverse and neutral-in-reverse problems that come from the reverse clutch inner seal surface, a leaking TCC solenoid feeding the reverse lockout valve, or mismatched adapter case and center support parts after an overhaul. A new pump will not fix those.
Check fluid level and condition first, then put a gauge on the line pressure tap GM provides on this case and compare idle and stall readings in every range. Low pressure in all ranges points at the pump, pressure regulator or a filter problem; low pressure in one range points at a circuit leak instead. Our line pressure testing guide walks through the hookup, and the slipping diagnosis guide helps separate pump loss from a single worn clutch pack. If the front seal keeps leaking, read converter hub and pump bushing wear before you buy.
This listing covers the 4L30E pump assembly. The 4L30-E went into BMW 318i, 323i, 325i, 328i, 525i, 528i and Z3 models, Isuzu Rodeo, Rodeo Sport, Trooper, Amigo, Axiom and VehiCROSS, Honda Passport, Acura SLX and Cadillac Catera. GM built it with three converter sizes (245, 258 and 265 mm), and the BMW/Opel and Isuzu versions use different gear ratios, so parts do not always cross between makes. Set your old pump next to this one and compare the bolt pattern, stator support and converter hub bushing bore before installing, or send us your year and VIN and we will confirm it. More 4L30E parts are in the hard parts category.
| Fits | 4L30E |
| Part type | Pump |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
The 4L30-E was used in BMW 3 Series, 5 Series and Z3 models, Isuzu Rodeo, Trooper, Amigo, Axiom and VehiCROSS, Honda Passport, Acura SLX and Cadillac Catera between roughly 1990 and 2004. Compare your old pump to this one or send your year and VIN to confirm.
Usually not on a 4L30-E. No reverse or neutral in reverse is more often the reverse clutch inner seal, a leaking TCC solenoid, or adapter case and center support parts from another manufacturer. Replace the pump when line pressure is low in every range.
A new front seal and pump gaskets at minimum, plus a filter and pan gasket. If the old pump left metal in the pan, clean the valve bodies and flush the cooler and lines so the debris does not reach the new pump.
GM's 1997 specification sheet lists Dexron III with about 7 quarts dry using the 245 mm converter. Some BMW applications specify their own fluid, so confirm against your owner's manual.
Clear the adaptive values with a scan tool if your vehicle supports it, then drive through normal light and moderate throttle shifts so the controller can relearn shift pressure.
