Replacement oil pump rotor support for 1997-2002 GM 4T65E transaxles, OE 24206183 and 24213197, for scored pump bores and low line pressure.
You have the side cover off a 1997-2002 GM 4T65E, the pump is on the bench, and the rotor support face is scored or the bushing area is worn. That is the job this part is for. It is a remanufactured oil pump rotor support that replaces GM part numbers 24206183 and 24213197, the piece that carries the pump rotor in the 4T65E used in the Chevrolet Impala and Monte Carlo, Buick Century, Regal and LeSabre, Pontiac Grand Prix and Oldsmobile Intrigue of that era. Buying the support alone lets you keep a good pump body, slide and vanes instead of paying for a complete pump.
The 4T65E pump is a vane pump mounted on the valve body and channel plate under the side cover, turned by a long shaft driven from the converter. The rotor support is the machined half the rotor and vanes run against. Its flat face seals the ends of the pumping pockets, and its bore locates the rotor so it spins true inside the pivoting slide. Sonnax's 4T65E pump instructions give rotor and vane end play of 0.0020-0.0033 inch. A support face that is scored or dished opens that clearance, oil slips from the high-pressure side back to the inlet, and the pump loses volume, worst at hot idle when the fluid is thin.
Before you blame the support, prove the pump is short on volume: a hot line pressure test that is low at idle and stays low as you command it up points at the pump. If idle pressure is fine but will not rise, look at the boost valve sleeve and the pressure control solenoid circuit instead. With the pump apart, lay a straight edge across the pump face and check rotor and vane end play with a feeler gauge, or use Plastigauge with the halves bolted together. Strip the pump and shake the halves with only the slide installed; you should hear the slide move. If the slide is the problem rather than the support, a complete pump is the better buy. Our 4T65E pump failure guide lists every bench check, and the 4T65E common problems guide covers what else causes low pressure.
This rotor support is listed for 1997-2002 4T65E transaxles and cross-references GM 24206183 and 24213197. Model year 2002 is the tricky one: Transmission Digest reported that in June 2002 GM changed the pump from a two-piece to a three-piece design and moved the rotor support sleeve from the valve body into the pump, and that early and late pump parts do not interchange. Read the number on your old support and match it to the two above before ordering, or send us your year and VIN and we will confirm it. If your pump body, slide or vanes are also worn, buy a complete 1997-2001 4T65E pump instead. All 4T65E parts are in the 4T65E collection.
| Transmission | |
| Replaces | |
| Condition | |
| Weight |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
GM 24206183 and 24213197. Check the number on your old support and match it before ordering, especially on a 2002 transaxle.
If only the support face or bore is scored and the slide, rotor and vanes measure in spec, the support alone is enough. If the slide sticks, vanes are chipped or the pump body pockets are scored, a complete pump is the better repair.
It is listed for 1997-2002. GM redesigned the pump in June 2002 and the early and late pump parts do not interchange, so for 2003-up units match your old part number or send us the year and VIN.
Sonnax's 4T65E pump instructions list rotor and vane end play of 0.0020-0.0033 inch and slide end play of 0.0003-0.0016 inch, measured with a straight edge and feeler gauge or with Plastigauge.
Yes. A weak pump pushes the adaptive pressure values up. Clear the adapts with a scan tool after the repair and drive normally so the PCM relearns on the restored pressure.
