6T50 Overhaul Kit 2012-2013, new and ready to install. Fits the 6T50. Ships fast from the USA.
If your 2012 or 2013 Buick or Chevrolet with a 6T50, 6T45 or 6T40 six-speed is leaking from the bell housing or pan, engaging late when it sits overnight, or slipping on the 1-2 shift with pressure codes, the hard parts may still be fine and the sealing parts are the problem. This is an overhaul kit for that 2012-2013 generation of the GM front-drive six-speed family, and it includes the bonded pistons along with the gaskets and seals. It is the soft-parts half of a rebuild: frictions, steels and a filter are not listed in the kit contents, so plan to source those separately if your clutch packs are worn.
The 6T50 is the higher-torque member of the family that also includes the 6T40 and 6T45. All three use two planetary gearsets and five clutches, and every clutch is applied by a hydraulic piston. Pump pressure is shaped by the control solenoid valve body on the side of the case and routed through the case, the support and the rotating drums to each piston. Gaskets, lip seals, O-rings, metal clad seals and sealing rings hold that pressure at every joint. Bonded pistons have the seal molded onto the piston itself, so when the rubber hardens or cracks the only fix is a new piston, which is why a kit that includes them saves a second order halfway through a rebuild.
GM switched these transmissions to the Gen 2 design during 2012. Its product update bulletin lists the changes, including removal of the pressure switches from the control solenoid valve assembly, and that is the main reason a Gen 1 kit for 2008-2011 is not the right part for a 2012-2013 unit.
Start with the fluid level, because overfilling pushes fluid out of the vent and looks like a seal leak. These units are checked hot at the level set plug, not with a dipstick, so follow the procedure in our 6T40 fluid leak guide. GM also issued PI0950 for leaks at the converter housing area on vehicles built before February 1, 2013, which covers part of this model range, so look at the converter seal before blaming the case. If the complaint is a late engagement rather than a leak, our delayed engagement guide walks through pressure checks that separate a worn piston seal from a bad valve body. A no-reverse or third-gear slip with P0776 is often a cracked 3-5-R wave plate, covered in our wave plate failure write-up, and seals alone will not fix it.
This kit is listed for 2012-2013 6T40, 6T45 and 6T50 transmissions in Buick and Chevrolet models with the 2.4L and 3.0L engines, and its description also names the 2013 Encore 1.4L, the 2012-2013 Verano 2.4L and the 2012-2013 Sonic 1.4L. Many of those cars carry the 6T40 or 6T45 rather than the 6T50, so read the RPO code on your glove box label or the tag on the case to confirm which unit you have. Seal and gasket details changed during these years, and the listing notes that the parts pictured are for reference and the contents can vary by unit. Match your old gaskets and pistons against the kit, or send us your year and VIN before you order. Earlier Gen 1 units are covered by the 6T50 2008-2011 kit, and the rest of our rebuild parts are in the rebuild kit section.
| Fits | 6T50 2012-2013 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
No. The listed contents are gaskets, rubber lip seals, O-rings, a pan gasket, metal clad seals, sealing rings and molded rubber gaskets, plus the bonded pistons. Frictions, steels and the filter are bought separately.
Probably not. GM moved to the Gen 2 design during 2012, so a 2008-2011 unit needs a Gen 1 kit. If your car was built near the changeover, send us the VIN and we will check it.
The seal is bonded to the piston, so a hardened or cracked lip cannot be replaced on its own. Cracked 1-2-3-4 pistons are a known cause of P2723 on this family, and GEARS Magazine advises replacing the bonded pistons on every rebuild.
DEXRON VI. The level is set hot at the level check plug with the engine running, not by filling to a mark on a dipstick.
Yes. Clear the transmission adaptive values and run the GM fast learn or drive cycle with a scan tool so the control module relearns clutch fill times on the fresh seals.
