6T45 Valve Body 2013-2018, remanufactured and ready to install. Fits the 6T45. Ships fast from the USA.
The 6T45 is the heavy-duty version of GM's front-drive six-speed, and in 2013-2018 crossovers such as the Equinox and Terrain it often works harder than the 6T40 in a compact car: more weight, more torque and, in many cases, a trailer. When one of these units starts flaring between gears, slamming into a range, slipping when hot or storing pressure control solenoid codes, the valve body is one of the first things a rebuilder checks. This remanufactured 6T45 valve body for 2013-2018 replaces the worn hydraulic control assembly in one piece.
ATRA describes the 6T45 as a heavy-duty 6T40: it gets a 1.25 inch drive chain instead of a 1 inch chain, a 5-pinion input planetary, a ribbed case and a heavier differential, and is rated for more input torque. The control side carries over generation for generation. The TEHCM bolts to the valve body, its pressure control solenoids signal a clutch regulator valve for each clutch, and the valve body's pressure regulator and actuator feed limit valves supply the oil all of that depends on. Because a 6T45 often carries a heavier vehicle, that hydraulic supply works under more load and heat, and worn bores show up as slip and burnt clutches sooner.
Two well-known 6T45 problems mimic a valve body and should be ruled out first. The 3-5-R wave plate cracks at the tooth corners across the 6T40/45/50 family and can bring hard shifts with P0776 or lose 3rd, 5th and reverse. A cracked 1-2-3-4 piston can set P2723. A single code tied to a single clutch points at that clutch; several pressure codes together, with solenoids that measure good, point upstream at the valve body. Check the fluid level hot at the plug and look for a calibration update before replacing anything. Our valve body symptoms and testing guide covers this family, including the 6T45, and 6T40/6T45 common problems and fixes explains the wave plate and piston failures.
This listing fits the 6T45 (RPO MH7 for front-drive, MHC for all-wheel drive) built 2013-2018. Read the RPO code off the service parts label in the glove box or trunk to confirm you have a 6T45 and not a 6T40, since GM put both into some of the same vehicle lines. Within these years GM used Gen 2 controls and, on some later vehicles, the Gen 3 design, and Gen 1 valve bodies never interchange with either. Match the TEHCM ID digit, filter plate and casting against the photos, or send your year and VIN. The Gen 2 casting for MH7 and MH8 is also listed if you only need the bare casting. If the label reads MH8 or MHB instead, order the 6T40 valve body for 2013-2018.
Bring the valve body up with the manual valve engaged on the detent lever, start every bolt by hand, and torque in the published sequence; Sonnax specifies 97 in-lb for the Gen 2/Gen 3 valve body to case bolts. Replace the TEHCM filter plate rather than reusing its seals, and fit a new filter and pan gasket with the 6T40/6T45 filter and pan gasket kit. Refill with Dexron VI, set the level at the check plug at 185-203 F, and run the Fast Learn so the TCM relearns clutch fill on the new bores. If the old fluid was dark with friction material, the clutches have already been slipping and may need attention too; the 6T45 clutch drum is listed for a teardown.
| Fits | 6T45 2013-2018 |
| Part type | Valve Body |
| Condition | Remanufactured |
| 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.
The control design is shared generation for generation, but the units differ in chain, planetary, case and differential, and calibrations differ. Order the part listed for your RPO code (MH7 or MHC for 6T45) and match the generation.
Check the RPO codes on the service parts label in the glove box or trunk. MH7 is the front-drive 6T45 and MHC the all-wheel-drive version; MH8 and MHB are 6T40.
Yes. A cracked 3-5-R wave plate can cause hard shifts with P0776 or loss of 3rd, 5th and reverse. One code on one clutch usually means that clutch; several pressure codes with good solenoids point to the valve body.
Dexron VI. Set the level hot at the check plug between 185 and 203 F with the engine idling.
A new TEHCM filter plate, the transmission filter and pan gasket, and fresh Dexron VI. If the old fluid shows heavy friction material, inspect the clutch packs as well.
