4T65E Pump 2002, remanufactured and ready to install. Fits the 4T65E. Ships fast from the USA.
If your 2002 or later Chevrolet Impala, Monte Carlo, Buick LeSabre, Century or Pontiac Grand Prix with the 4T65E is slow to pick up Drive or Reverse after it sits, whines in step with engine speed, or has started setting P1811 on a long hot drive, the oil pump belongs on your suspect list. This is a remanufactured 4T65E pump for the 2002-and-later design, supplied with the pump rotor support already in place. The listing references GM part numbers 24225894 for the pump and 24213197 / 24206183 for the rotor support, which is what you should compare against your old unit.
The 4T65E does not use a front-mounted pump behind the converter. Its pump is a rotor-and-vane design riding inside a pivoting slide, bolted to the valve body and channel plate under the side cover and turned by a long pump shaft driven from the converter. The slide swings toward full output at idle and backs off as pressure builds, so a pump with worn pocket faces, chipped vanes or a slide that hangs up loses volume first at hot idle. Starting in June 2002, Hydra-matic changed this pump from a two-piece to a three-piece design and moved the rotor support sleeve out of the valve body and into the pump. That change is exactly why this listing exists separately from our earlier two-piece pump.
Check the fluid hot first; a low level will make a good pump cavitate and whine. Then run a line pressure test hot, in Park and Neutral, at least three times. Pressure that is low at idle and stays low as you command it up points at the pump or a worn boost valve sleeve. Pressure that is fine at idle but will not rise points more toward the boost valve, the EPC solenoid circuit or a worn AFL valve bore in the channel plate. Our 4T65E pump failure guide walks through the full test and the bench clearances, and the delayed engagement guide covers the other causes of a slow Drive or Reverse.
This pump is the three-piece design for 4T65E transaxles built from June 2002 on. Model year 2002 is the split year: a car built early in the 2002 run can still carry the first-design two-piece pump, the valve body with the rotor support sleeve, the large pressure switch assembly and the large pressure control solenoid. Transmission Digest reported that first-design and second-design pumps, valve bodies, pressure switches and PC solenoids do not interchange. Read the ID tag on the case and compare your old pump against the part numbers above before you order, or send us your year and VIN and we will check it. If your unit turns out to be the earlier design, you need our 1997-2001 4T65E pump instead. Browse the rest of the 4T65E parts collection for matching second-design parts.
| Fits | 4T65E 2002 |
| 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.
Only if the transaxle has the second-design parts. GM switched to the three-piece pump in June 2002, so some 2002 cars still have the earlier two-piece pump and matching valve body. Check the ID tag and compare your old pump to part number 24225894, or send us the year and VIN.
Yes. This listing is the pump with the rotor support installed. On the three-piece design the rotor support sleeve lives in the pump rather than in the valve body, which is one reason the early and late parts do not swap.
No. The early valve body still carries the rotor support sleeve, and Transmission Digest reported that first- and second-design pumps, valve bodies, pressure switches and PC solenoids do not interchange. Keep the whole set on one design level.
DEXRON-VI. GM's 2008 Impala owner manual lists 7.4 quarts for the transaxle, with more needed if the converter was drained, and calls for checking the level at 180-200 degrees F.
Yes. A weak pump makes the PCM learn high adaptive pressure values to cover it. Clear the adapts with a scan tool after the repair and drive normally so it relearns on the new, stronger pressure.
