6T30 Overhaul Kit 2011-2013, new and ready to install. Fits the 6T30. Ships fast from the USA.
If your 2011, 2012 or 2013 Cruze, Sonic or other GM compact with the 6T30 six-speed is leaking from the bellhousing, slipping into third or fifth, or taking a long breath before it grabs reverse on a cold start, and the transmission is coming out for internal work, this is the reseal set you build it with. It is a new overhaul kit of gaskets, lip seals, O-rings, sealing rings and the small rubber parts for an internal rebuild of the 6T30, listed for 2011-2013 production. It does not include clutch plates, steels or bonded pistons.
The 6T30 is the lightest member of the GM 6T30/6T40/6T45/6T50 front-drive family, and it works the same way as its bigger siblings: five clutches are applied by pistons, and every one of them depends on fluid reaching it through the case, the clutch housings and the valve body without bleeding off along the way. The sealing rings ride on rotating shafts and housings, the lip seals and O-rings hold the apply pressure behind each piston, and the gaskets close up the case halves, pan and valve body. Once that rubber is hard or nicked, line pressure leaks away before it reaches the clutch and the control module reads it as slip.
Start with level and condition, done hot at the check plug, not a guess off the fill cap. If the fluid is fine and the problem is a single outside leak, fix that leak; our 6T40 family fluid leak guide walks through the usual spots, and GM's PI0950 says not to pull a unit only for a converter seal. If you have P0776 or missing third, fifth or reverse, GM's PI0670A sends technicians to the valve body, pump and 3-5-R housing, then to the 3-5-R piston for cut sealing lips, and warns that an air check through the case is not reliable. The full picture of this family's weak points is in our 6T40 common problems guide.
This kit is listed for 2011-2013 6T30 units. That window straddles an important change. GM bulletin PI0604C describes the 2012 model year Gen 2 update, which removed one 3-5-R and 4-5-6 clutch fluid seal ring from the case and revised and relocated the 4-5-6 piston outer seal. GM also lists exceptions: the 2012 Cruze and Sonic with the 1.8L stayed on the Gen 1 design, while every 2013 vehicle in that bulletin is Gen 2. Since 2013 also appears in our 6T30 overhaul kit for 2013-2018, send us your year and VIN before ordering for a 2012 or 2013 car and we will confirm which set matches your case. Pistons, frictions and full kits for other units are in our rebuild kits collection.
| Fits | 6T30 2011-2013 |
| Part type | Overhaul 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.
No. It is a gasket and seal overhaul kit: gaskets, lip seals, O-rings, sealing rings and small rubber parts. Frictions, steels and bonded pistons are separate purchases.
Possibly, but 2013 is covered by both this kit and our 2013-2018 kit, and GM says all 2013 vehicles in PI0604C use the Gen 2 design. Send us the year and VIN so we can confirm the right one before you order.
Per GM PI0604C, Gen 2 removed one 3-5-R and 4-5-6 clutch fluid seal ring from the case and revised and relocated the 4-5-6 piston outer seal. That is why a kit has to match the generation of your case.
DEXRON VI. Check the level with the engine running, in park, with the fluid at 85-95 C, at the check plug. Even half a quart over can push fluid out of the vent.
Yes. After a rebuild the control module should go through the adaptive learn procedure with a scan tool so it learns the new clutch fill characteristics; until then shifts can feel firm or soft.
