4T65E Pump 1997-2001, remanufactured and ready to install. Fits the 4T65E. Ships fast from the USA.
A 1997-2001 Buick Century, Regal or LeSabre, Chevrolet Impala or Monte Carlo, or Pontiac Grand Prix that takes a second or two to drop into gear on a warm morning, groans in time with the engine at a stoplight, or flares on the 1-2 shift once the fluid is hot is a classic tired 4T65E pump. This listing is a 4T65E oil pump assembly supplied with the pump rotor support, for transaxles built in the 1997-2001 model years. The listing references GM pump number 24225894 and rotor support numbers 24213197 and 24206183, so put your old pump next to those numbers before you order.
On this transaxle the pump is not up front behind the converter. It is a variable-displacement vane pump bolted to the valve body and channel plate under the side cover, spun by a long pump shaft that takes its drive from the converter. Inside, a rotor and vanes run in a slide that pivots: at idle the slide swings toward full output, and as line pressure builds the slide is pushed back so the pump stops wasting horsepower. Everything else in the unit, from the clutch apply circuits to the converter clutch feed and the solenoid supply, lives on the oil this pump moves. When the rotor, vanes or pocket faces wear, the pump loses volume first at hot idle, which is why most early 4T65E pump complaints show up after the car is warmed up.
Start with a hot fluid check; low fluid will make a healthy pump cavitate and whine. Then test line pressure hot, in Park and Neutral, and repeat it at least three times since these faults come and go. Low pressure at idle that stays low when you command it up is the pump or the regulator dumping oil. Normal idle pressure that will not climb points more at the boost valve sleeve, the pressure control solenoid circuit or a worn AFL valve bore in the channel plate, none of which a new pump will fix. Our 4T65E pump failure guide covers the test and the bench clearances, and the EPC solenoid guide helps rule out the regulation side on 1997-2002 units.
This pump is listed for 4T65E transaxles from 1997 through 2001. That range matters because in June 2002 GM changed the 4T65E pump from a two-piece to a three-piece design, moved the rotor support sleeve from the valve body into the pump, changed the pump bolt lengths, and shrank the pressure switch and pressure control solenoid. Transmission Digest reported that the early and late pumps, valve bodies, pressure switches and PC solenoids do not interchange. Cars from 1997-2001 should carry first-design parts, but transaxles get swapped, so read the case ID tag and compare the numbers cast and stamped on your old pump with the ones above, or send us your year and VIN and we will check it. A 2002 built after June, or any 2003-up car, needs our 2002-up 4T65E pump. See every early and late part in the 4T65E collection.
| Fits | 4T65E 1997-2001 |
| Part type | Pump |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Maybe not. GM switched to a three-piece pump in June 2002, so a 2002 built after that date takes the later pump. Read the ID tag and compare your old pump's numbers to 24225894 and 24213197 / 24206183, or send us the year and VIN before ordering.
Yes. The listing is the pump with the rotor support. If only your rotor support face is scored and the pump body is good, we also list the rotor support on its own.
Possibly, but check the fluid level hot first, since low fluid makes the pump cavitate and whine. A pump whine follows engine rpm and is present in Park and Neutral; a noise that follows road speed is more likely a bearing or the final drive.
A new filter and pan gasket at minimum, and inspect the pump shaft and channel plate sleeve. If line pressure would not rise during testing, check the boost valve sleeve and pressure control solenoid too, because a pump alone will not cure those.
DEXRON-VI. GM lists 7.4 quarts for the 4T65E in the 2008 Impala owner manual, with more needed if the converter was drained. Check the level at 180-200 degrees F.
