Complete overhaul set of frictions, steels, gaskets and seals for the GM 6L45 and 6L45E, covering 2007-2011 Cadillac CTS 2.8L rebuilds.
If your Cadillac CTS 2.8L, SRX, STS or XLR has started slipping when it pulls away, hangs in neutral when cold, or came back from the shop with a burnt clutch pack on the pan magnet, this is the soft-parts kit for the rebuild. It covers the GM 6L45 and 6L45E six-speed with a full set of friction plates, steel plates, gaskets and the seal and sealing ring kit (manufacturer part number AHM-QMP-I12D0393), so the whole unit goes back together in one pass.
The 6L45 is the light-duty member of GM's rear-drive Hydra-Matic six-speed family, sharing its layout with the 6L50, 6L80 and 6L90. Every gear comes from applying two of five clutches: the 1-2-3-4, 2-6, 3-5-Reverse, 4-5-6 and Low/Reverse, with a low one-way clutch handling first in Drive. Because each clutch works in several gears, one glazed pack shows up in more than one shift. This kit renews the frictions and steels in all five packs plus the piston seals, sealing rings and case gaskets that hold apply pressure, which is why it is the right buy once the unit is already out of the car.
Do not order a kit on a no-forward until the cheap causes are ruled out. Transmission Digest documented a 2010 AWD CTS that would back up but not drive, with clean fluid in the pan. The cause was the number 1 check ball in the upper valve body, worn small enough to let 1-2-3-4 clutch feed oil leak to exhaust. Gears Magazine reports these balls shrinking from .250 in. to about .180 in. On AWD CTS cars, also check the output shaft to transfer case splines for fretting before the transmission comes out. If the fluid is clean and there is no clutch debris, start with our 6L45 limp mode diagnosis guide and a line pressure test. A burnt smell and friction material in the pan point to the clutches, and that is when this kit earns its price.
The listing covers the Cadillac CTS 2.8L 2007-2011, SRX 4.6L 2006-2009, STS 4.6L 2006-2010 and XLR 4.6L 2006-2009. GM identifies this family by RPO code: MYA is the 6L45 and MYB is the 6L50. Check the service parts label in the glovebox or trunk before you order, and compare the plate counts against what comes out of your drums. If the label is missing or you are unsure, send us the year and VIN and we will check it before it ships. Other 6L45 parts are on our 6L45 parts page.
The kit does not include the filter, pump, valve body, hard parts or torque converter. Order a filter with it, and send the converter out for service or replace it so the old clutch debris does not end up back in the new unit. Flush the cooler and lines before startup, then run the adaptive relearn with a scan tool once the unit is at operating temperature.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing covers the CTS 2.8L for 2007-2011. CTS models with other engines may have a different transmission. Check the RPO code on the service parts label: MYA is the 6L45 and MYB is the 6L50. Send us the VIN if you want us to confirm before it ships.
No. It includes the frictions, steels, gaskets and the seal and sealing ring kit. The filter, pump, valve body, hard parts and torque converter are not included, so order a filter and plan for converter service.
Not always. A worn number 1 check ball in the upper valve body can cause no-forward with clean fluid, and AWD cars can strip the output shaft to transfer case splines. Rule those out first. If the fluid is burnt and there is clutch material in the pan, a full rebuild with this kit is the right repair.
Use Dexron VI. Soak the new frictions in it before assembly, then fill and check the level hot using the procedure for your vehicle.
Yes. The control module keeps adaptive values from the worn clutches. Reset them with a scan tool and drive through a full relearn so the new clutches apply correctly.
