6T40 Shift Kit 2013-17, new and ready to install. Fits the 6T40. Ships fast from the USA.
Searching for a fix for a 2013-2017 Cruze, Malibu, Sonic, Encore or Terrain that slips between gears, shudders at cruise, or sets pressure control solenoid codes? On the second-generation 6T40 that pattern very often comes from worn valve body bores rather than a bad transmission. This is the TransGo SK6T40-G2 SHIFT KIT valve body repair kit, made in the USA, for Gen 2 6T30, 6T40 and 6T45 units built without pressure switches.
When GM moved the 6T40 to Gen 2, the pressure switches came off the control solenoid body and the solenoid lineup changed, but the hydraulic weak spots stayed. The TCM still depends on a steady solenoid feed from the actuator feed limit valve, a clean EPC boost signal at the pressure regulator, and a sealed TCC regulator valve. Wear at any of those leaks pressure, so the clutches apply late and soft. The Gen 2 kit fixes the AFL bore differently from the Gen 1 kit: instead of a drop-in bushing, you ream the bore and fit an oversized valve. In the box:
The AFL-G2-TK is a universal tool kit TransGo also uses for several other six- and eight-speed kits, so a shop that already owns one can install this kit right away.
GM has tied many of those same codes to a damaged pump giving low line pressure on 2011-2014 units, and to a non-functioning pressure control solenoid. Rule those out with a hot fluid level check, a code and freeze frame review, and a commanded versus actual pressure test. Our 6T40 valve body symptoms guide explains which bore produces which complaint, and the 6T40 delayed engagement guide covers the pump and pressure side.
TransGo lists the SK6T40-G2 for Gen 2 6T30, 6T40 and 6T45, 2013-17, without pressure switches. Two cautions on the edges of that range. Some 2012 units are already Gen 2, so a 2012 can use this kit if it has no pressure switches. At the other end, TransGo says the 6T40 series began moving to Gen 3, with a chain-driven pump, at the start of 2015 model year production, and Gen 3 units take a separate SK 6T40-G3 kit. On a 2015-2017 vehicle, confirm the pump drive and TEHCM generation before you order, or send us your year and VIN. For Gen 1 units use the 6T40 2007-2012 shift kit; the same Gen 2 kit is also listed as the 6T45 2013-17 shift kit.
| Fits | 6T40 2013-17 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. The oversized AFL valve in the SK6T40-G2 needs the TransGo AFL-G2-TK tool kit to ream the bore, and it is sold separately. The other two valves drop in.
Only if the transmission is Gen 2. TransGo says the 6T40 series started moving to Gen 3 with a chain-driven pump at the start of 2015 model year production, and Gen 3 needs the SK 6T40-G3. Send us your VIN to check.
Gen 2 units have no pressure switches on the control solenoid body. You can also read the eighth digit of the TEHCM part number, which identifies the generation.
Yes. TransGo catalogs this kit for Gen 2 6T30, 6T40 and 6T45 transmissions, 2013-17, without pressure switches.
Dexron VI, with the level checked at operating temperature. Then clear codes and run the Service Fast Learn so the TCM relearns clutch fill.
