6T30 Pump, remanufactured and ready to install. Fits the 6T30. Ships fast from the USA.
If a small GM car with the light-duty 6T30 six-speed takes a second or two to pick up Drive or Reverse, feels soft on every shift when warm, or carries a whine that follows the tachometer, the oil pump is one of the first parts to suspect. This remanufactured pump is listed for the 6T30 and cross-referenced to GM numbers 24245551, 24256950 and 24256951. The same casting design also serves the 6T40 and 6T45.
The 6T30 is the lightest member of GM's 6T40 family, built for the smaller four-cylinder engines. Internally it follows the same plan as its bigger siblings: a clutch-to-clutch six-speed where a solenoid body meters pressure to each clutch, and the pump supplies all of it. On Gen 1 and Gen 2 units the pump is driven off the torque converter, so its output rises and falls with engine speed. It also feeds the converter and the cooler circuit. A pump that leaks internally gives the computer slow, inconsistent clutch fills, and because small engines make little torque at idle, a weak 6T30 pump usually shows up first as a lazy garage shift.
Check the fluid first, and do it hot at the level set plug. ATRA's procedure calls for 85-95 C, and a 6T30 that is a half quart low will act just like one with a tired pump. Next, sort out whether the slip is everywhere or only in certain gears. Slipping only in Reverse, 3rd and 5th with P0776 is the 3-5-R clutch, not the pump. A delay that only happens on the first start of the morning can be fluid drainback. Our delayed engagement guide lays out each test, and the 6T40 fluid leak guide shows where these units lose fluid.
This pump fits the 6T30 and is cross-referenced to 24245551, 24256950 and 24256951. It is the converter-driven design used before Gen 3. GM switched to an off-axis chain-driven vane pump for the 2015 model year Gen 3 units (6T31 and up), and that pump does not interchange. If your tag reads 6T31, look at our Gen 3 6T40 pump instead. Because Gen 1 and Gen 2 overlapped during 2012, match the number on your old pump or send us your year and VIN so we can confirm before it ships. If shifts stay erratic after the pump is replaced, the 6T30 valve body for 2013-2018 is the next control part to check against your unit.
| Fits | 6T30 |
| Part type | Pump |
| Condition | Remanufactured |
| Brand | GM |
| Reference | 24245551 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
This pump is listed for all three, and it carries the same cross-reference numbers, 24245551, 24256950 and 24256951. The exception is Gen 3 units from the 2015 model year, which use a different chain-driven pump.
Gen 3 units carry the 6T31 designation and began with the 2015 model year. Check the tag on the case, or send us your VIN.
Yes. A 6T30 that is even a little low will engage slowly and slip. Check the level hot, at 85-95 C, at the level set plug before you condemn the pump.
A new converter seal, the pan gasket and filter, and fresh DEXRON VI. If the old pump left debris, flush the cooler and lines.
Yes. Clear adaptive values and run the adaptive learn with a scan tool so the TCM relearns clutch fill times.
