6T40 Banner Rebuild Kit 2008-11, new and ready to install. Fits the 6T40. Ships fast from the USA.
A first-generation 6T40 that has lost reverse, slips into third, or throws P0776 is one of the most common GM six-speed jobs on the bench, and most of those units came out of a 2009-2011 Malibu, Saturn Aura, Pontiac G6, Buick LaCrosse or first-year Cruze. This 6T40 banner rebuild kit is built for that 2008-2011 Gen 1 window. It is set up as a master-style kit without steel plates: the overhaul gaskets and seals, a rubber pan gasket, and a Raybestos friction clutch pack module (listing reference RHT96-246). Friction material from a known transmission-clutch maker matters here, because the 6T40 judges every shift by how fast each clutch picks up.
The 6T40 makes six forward speeds and reverse from five clutches: the 1-2-3-4, 3-5-R and 4-5-6 rotating clutches plus the 2-6 and low/reverse holding clutches. Each pack is a stack of frictions and steels clamped by a piston, and the TCM, built into the TEHCM mounted on the valve body, controls apply pressure through its solenoids. As the frictions wear, apply times stretch, the adapts climb, and the TCM eventually sets a code. This kit renews the frictions in those packs and every gasket and seal that keeps pressure in the circuits, which is the core of a standard overhaul.
Check the build date first. GM's bulletin applies to 6T30/40/45/50 transmissions built on or before Julian date 11-015 (January 15, 2011), which covers nearly every unit this kit is meant for. Next, check the fluid level hot at the check plug and scan the TCM. A code that points to a single solenoid or pressure switch with clean fluid is a controls problem, covered in our 6T40 shift solenoid guide. A P0776 with dark fluid and no reverse means the unit has to come apart. Our 6T40 rebuild cost breakdown shows what else typically gets added to the parts list once the case is split.
This kit is listed for 2008-2011 6T40 transmissions (it also covers the 6T45 and 6T50 of the same years). GM's PI0780A lists the early family in the 2008-2011 Malibu, 2009 Aura, 2009-2010 G6, 2010-2011 LaCrosse, 2011 Regal and 2011 Cruze, among others. For 2012 GM moved most applications to Gen 2 controls (a few, such as the 2012 Cruze 1.8L, kept Gen 1) and later revised the 4-5-6 clutch, so a 2012-up unit should be matched to its own kit. Confirm your RPO code on the service parts label and your build date, or send us the year and VIN. Kits for other years and models are on the rebuild kits collection page.
| Fits | 6T40 2008-11 |
| Part type | Banner Rebuild Kit |
| Condition | New |
| Brand | Raybestos |
| 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 2008-2011 6T40, 6T45 and 6T50 transmissions, and the 2008-2011 Malibu is in GM's early-family bulletin. Confirm the transmission RPO on the service parts label and the build date, or send us the year and VIN before ordering.
No. This kit is listed for 2008-2011 units only. GM moved most 2012 applications to Gen 2 controls and later revised the 4-5-6 clutch, so a 2012-up unit should be matched to a kit for its own build.
Steels are not included; the kit is described as a master kit less steels. Pistons are not listed as part of it either. Plan on a new 3-5-R piston and waved plate at minimum, since GM recommends replacing them whenever the unit is disassembled.
GM's PI0780A traces slip or no reverse and 3rd, with P0776, to a broken 3-5-R apply (waved) plate on units built on or before January 15, 2011. The debris must be cleaned from the whole transmission during the rebuild.
DEXRON VI, with the level set hot (85-95 C) at the check plug. After the rebuild, reset adapts and perform the transmission adaptive learn with a scan tool.
