6L45 Master Rebuild Kit, new and ready to install. Fits the 6L45. Ships fast from the USA.
A 6L45 that flares on the 1-2 shift, slips when you lean on it from a stop, or has filled its pan with dark clutch material has usually worn out more than one clutch pack at the same time. This master rebuild kit is sized for that job: one box with the friction plates, the steel plates and the complete gasket and seal set for the GM six-speed rear-drive family, listed for BMW 1, 3 and 5 Series and X3 models, the Cadillac CTS, STS, SRX and XLR, and the Pontiac G8 V6. If you have already pulled the transmission, this is the kit that lets you close it up with nothing old left inside except hard parts.
The 6L45 gets six forward gears from five clutches working in pairs: the 1-2-3-4, 3-5-Reverse, 4-5-6, 2-6 and Low/Reverse clutches, plus a low one-way sprag. Every shift is one clutch releasing while another applies, so a single glazed pack throws off the timing of every gear it is part of. The kit replaces the frictions and steels in all five packs and renews the rubber and paper that hold pressure in the circuits feeding them: the molded pan gasket, the two valve body separator plate gaskets, the pump gasket, the lip seals, sealing rings and O-rings. Renewing the steels along with the frictions matters here, because a heat-blued steel will glaze a new friction within a few hundred miles.
Not every no-forward 6L45 needs clutches. Gears Magazine documents a classic case where a check ball in the upper valve body upsets the 1-2-3-4 clutch circuit and mimics a burnt clutch, and Transmission Digest describes a 2010 AWD CTS whose slipping complaint came from fretted splines between the output shaft and transfer case. Work through our 6L45 limp mode diagnosis guide first: read the codes, check line pressure, and air-check the clutches with the pan off. If the pan is full of friction material, you are past diagnosis and into an overhaul.
The kit is listed for 2006-2011 BMW 1 Series and 3 Series, 2006-2010 BMW 5 Series and X3 with the six-cylinder engines, 2007-2011 Cadillac CTS and CTS Sport Wagon (2.8L, 3.0L and 3.6L), 2006-2009 SRX 4.6L, 2006-2011 STS, 2006-2009 XLR, and 2008-2010 Pontiac G8 3.6L. That list covers both the 6L45 and the heavier 6L50, which share a case design but not every internal part, so read the RPO code on your vehicle's service parts label (MYA for 6L45, MYB for 6L50) or send us your year and VIN before ordering. Other 6L45 parts are on our 6L45 transmission parts page.
| Fits | 6L45 |
| Part type | Master Rebuild Kit |
| Condition | New |
| 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.
It is listed for both, and the vehicle list mixes 6L45 and 6L50 applications. The two share a case design, but clutch counts can differ, so check the RPO code on your service parts label (MYA = 6L45, MYB = 6L50) or send your VIN before ordering.
A full friction plate set, a full steel plate set and the complete overhaul gasket and seal kit, including the molded pan gasket, valve body separator gaskets, pump gasket, lip seals, sealing rings and O-rings. A filter and bushings are not part of this kit.
Only if the 1-2-3-4 clutch is actually burnt. A no-forward can also come from a valve body check ball problem or, on AWD CTS models, worn output shaft splines. Air-check the clutches and inspect the pan contents before committing to a full rebuild.
GM applications use Dexron VI. BMW versions of the transmission take the fluid BMW specifies for that vehicle. Fill to the level procedure in the service information with the fluid at operating temperature.
Yes. Clear the old adaptive values and run the shift adapt or fast learn procedure with a scan tool that supports it. Old adapts were learned on worn clutches and will cause harsh or flared shifts until they reset.
