6L50 Pump, used and ready to install. Fits the 6L50. Ships fast from the USA.
If you have your 6L50 apart and found the pump stator scored, the stator shaft splines chewed, or the sealing ring lands worn into steps, this is the part you need rather than a whole pump. It is a used original GM pump stator assembly for the 6L45 and 6L50, industry number 45520B: the cover half of the front pump with the stator shaft pressed in. It is listed as possibly fitting Chevrolet Camaro, Caprice and Colorado, Cadillac ATS, STS, SRX and CTS, and BMW 1 Series, 3 Series, X1 and X3 applications, so confirming your exact unit is part of the job.
The 6L50 pump is built as two halves. The pump body in the bellhousing holds the rotor and slide, and the stator assembly bolts over it to close the pocket and form the other running face for the vanes. The long splined shaft in the middle is the stationary anchor for the torque converter stator, which is what lets the converter multiply torque off the line. Fluid for converter apply and release and for the input clutches also passes through the stator shaft and across the sealing rings that ride on it. So a worn stator does not just cost pump volume: it can bleed off converter and clutch feed oil as well. One parts supplier lists the matching 6L45/6L50 bellhousing pump assembly, casting 24226870, as needing alignment with tool T-46664AC, which tells you how tight the fit between these pieces is meant to be.
Gauge line pressure hot and cold first; our 6L pump failure symptoms guide shows what low pressure looks like on this family. Then rule out hydraulic controls, since a pressure control solenoid or valve body fault can mimic a pump problem; the 6L45 limp mode guide covers the 6L50 too. With the pump out, lay a straightedge across the stator face, look for vane tracks, check the shaft splines and ring lands, and compare against this used stator.
This stator is listed for the GM 6L45 and 6L50 (RPO MYA and MYB). It does not fit the larger 6L80 or 6L90. The vehicle list is a may-fit list, so match the casting and part number on your original stator, and tell us your year, make, model, engine and VIN if you are not sure. BMW GA6L45R pumps use a bearing where GM units use a bushing in the pump body, so BMW owners should compare the pump body side as well. Browse more parts in the 6L50 parts collection.
Because this is a used part, clean it, blow out every passage and inspect the ring lands and shaft before assembly. Use a new stator-to-pump gasket rather than reusing the old one, and fit new sealing rings on the stator shaft. Pair it with the new rotor and slide in our 6L50 pump repair kit if your vanes are worn, and with an 6L50 overhaul kit for the gaskets and seals. Align the pump halves, torque evenly, and make sure the rotor turns freely. Fill with Dexron VI such as ACDelco 10-9395, prime the pump, and run a transmission adapt relearn after the repair.
| Fits | 6L50 |
| Part type | Pump |
| Condition | Used |
| 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.
No. It is the pump stator assembly, the cover half of the pump with the stator shaft. You reuse your pump body, rotor and slide or replace them separately.
No. Part 45520B is listed for the 6L45 and 6L50 only. The 6L80 and 6L90 use their own pump parts.
It is a used original GM part. Clean and inspect it, and install new sealing rings and a new stator-to-pump gasket.
Replace the pump gasket, stator shaft sealing rings and front seal, and rebuild the rotor and slide if they show wear. An overhaul kit covers most of the soft parts.
Dexron VI. Prime the pump before the first start and run a transmission adapt relearn with a capable scan tool after the repair.
