4T60E Pump, remanufactured and ready to install. Fits the 4T60E. Ships fast from the USA.
A 1990s GM front-wheel-drive car running the 4T60E - a Chevrolet Lumina or Monte Carlo, Buick Regal, Century, LeSabre or Park Avenue, Oldsmobile Cutlass Supreme or Eighty-Eight, Pontiac Grand Prix or Bonneville - that takes a long time to go into gear, whines with engine speed, or slips in every range is often running out of pump volume. This is a complete remanufactured 4T60E oil pump assembly, casting number 24200370, sold as a finished pump so you are not rebuilding rotor, vanes and slide on the bench yourself.
The 4T60E is the electronically controlled version of GM's 4T60 transaxle, built for the 1991 through 1999 model years before the 4T65E replaced it. Its pump is a vane-type pump - Sonnax still lists replacement 4T60 and 4T60-E pump vanes - and it supplies every bit of oil the unit uses: line pressure to apply the clutches and bands, feed to the torque converter, and lube and cooler flow. When the rotor, vanes or pocket faces wear, the pump leaks internally and moves less oil, and the effect shows up everywhere at once rather than in one gear. Because worn pumps run the fluid hot, a tired pump also speeds up wear on the 2nd and 3rd clutches it is supposed to be feeding.
Check the fluid level hot first; a low level makes any pump cavitate and whine. Then put a gauge on the line pressure tap and test hot. Low pressure at idle that stays low as you raise engine speed points at the pump. Pressure that is fine at idle but will not climb under load can also come from the valve body: Sonnax's 4T60/4T60-E valve body layout ties low line rise, soft shifts and 2nd and 3rd clutch distress to a worn modulated line boost valve, and erratic pressure and overheating to pressure regulator wear. The 4T65E grew out of this unit and the diagnosis is very similar, so our 4T65E pump failure guide and delayed engagement guide are good walk-throughs for the 4T60E too.
This assembly is for the 4T60E and is identified by casting number 24200370. The listing does not tie it to specific model years, and the 4T60E ran through several revisions between 1991 and 1999, so match the casting number on your old pump before ordering, or send us your year and VIN and we will check it. It is not a 4T65E pump; for the later unit see our 1997-2001 4T65E pump and the 4T65E and 4T60E parts collection.
| Fits | 4T60E |
| Part type | Pump |
| Condition | Remanufactured |
| Brand | OEM |
| Reference | 24200370 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The 4T60E was used in 1991 through 1999 GM front-wheel-drive cars, including the Chevrolet Lumina and Monte Carlo, Buick Regal, Century, LeSabre and Park Avenue, Oldsmobile Cutlass Supreme and Eighty-Eight, and Pontiac Grand Prix and Bonneville. Not every car on those nameplates got the 4T60E, so confirm your transmission before ordering.
Compare the casting number on your old pump to 24200370. The 4T60E changed during its production run, so the casting number is the most reliable match. If you cannot read it, send us your year and VIN.
No. The 4T65E replaced the 4T60E starting in 1997 and its pump and valve body are different parts. Order the pump for the transaxle you actually have.
Yes. Sonnax ties low line rise, soft shifts and 2nd and 3rd clutch distress on the 4T60-E to worn boost and pressure regulator valves. If pressure is normal at idle but will not climb, check the valve body before replacing the pump.
Replace the filter, flush the cooler and lines, and inspect the pump drive shaft and its bushings. If the unit is out for an overhaul, a rebuild kit and a shift kit are worth doing at the same time.
