8L45 Pump 2015, used and ready to install. Fits the 8L45. Ships fast from the USA.
This is a used GM 8L45 pump stator support, the cast aluminum front piece marked with casting number 24277226, listed for 2015 and later units. It is not a complete pump with gears and chain; it is the stationary support that the pump circuit and the converter work against. The listing names the Chevrolet Camaro and Colorado, the GMC Canyon, and the Cadillac ATS, CTS, CT4 and CT6 as likely applications. Buyers usually land here because a teardown turned up a cracked casting, chewed stator splines, a scored bushing journal or worn sealing ring lands, or because the truck has a delayed engagement or drops out of gear at a stop and the stator support is one of the known causes.
The 8L45 uses an off-axis, chain-driven pump instead of a pump bolted straight around the converter hub. The stator support is the fixed shaft and flange at the front of the gear train. Its splines hold the converter stator one-way clutch still, the bore guides the input shaft, and drilled passages inside it route converter feed, release and clutch apply oil to the rotating parts behind it through sealing rings. Because so much oil crosses this one casting, a worn ring land or a leak inside it shows up as a pressure problem even when the pump itself is healthy.
GM also changed this part. GEARS Magazine reports that early 8L45 and 8L90 units could trap air in the stator cover oil passages, which let the C5 (4-5-6-7-8-Reverse) circuit drain down and caused a delayed engagement or a drop out of gear at a stop. The fix was an updated stator support, listed for the 8L45 as GM 24277230, with an extra check ball and revised passages to purge air and keep C5 charged.
Start with GM bulletin 20-NA-187: after the vehicle has sat 8 to 24 hours, shift into gear and watch input speed on a scan tool. If it takes longer than 3 seconds to reach zero, run the C5 learn before blaming hardware. If the learn does not hold, the stator support passages and C5 seals are next. A no-pressure condition right after a rebuild is more often a pump that never primed, which our 8L45 and 8L90 pump failure guide walks through, including the bench-prime method. Our 8L90 and 8L45 common problems guide covers the fluid and shudder issues that get confused with pump faults.
This casting is listed for 2015-up 8L45 applications. It does not fit the 8L90, which uses its own stator support and cover. Two variations matter. First, the early and updated stator supports differ internally, so compare your old part and the casting number before swapping. Second, GEARS notes that converters with the centrifugal pendulum absorber use a shorter stator shaft without a bushing, and the two styles cannot be converted to each other. Match the casting, the bushing and your converter type, or send us your year and VIN and we will check it. The 2016 8L45 pump listing and 2018 version carry different part numbers, and all parts for this family are on the 8L90 and 8L45 collection page.
| Fits | 8L45 2015 |
| Part type | Pump |
| Condition | Used |
| Brand | OEM |
| Reference | 24277226 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is the cast aluminum pump stator support, casting 24277226. The pump gears, chain and sprockets are separate parts.
No. The 8L90 uses its own stator support and stator cover. This casting is for the 8L45 only.
The listing names the 2015-up Chevrolet Camaro and Colorado, GMC Canyon, and Cadillac ATS, CTS, CT4 and CT6. Send your year and VIN if you are unsure.
It can if the old stator support is the early design that traps air in the C5 circuit or has worn ring lands. Run GM's 3-second input speed test and the C5 learn first, then compare your casting with the updated GM 24277230 design.
DEXRON HP. GM TechLink lists a 7.4 quart service refill; a rebuilt unit with a dry converter needs more, so check level hot.
